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Finding the Fourth Proportional to 659,664,006.20, 989,496,009.30 and 629,430,918.20

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Solution

The fourth proportional to 659,664,006.20, 989,496,009.30 and 629,430,918.20 is: 944,146,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,664,006.20 : 989,496,009.30 = 629,430,918.20 : x
  2. Step 2: Convert to fraction form
    659,664,006.20/989,496,009.30 = 629,430,918.20/x
  3. Step 3: Cross multiply
    659,664,006.20x = 989,496,009.30 × 629,430,918.20
  4. Step 4: Simplify right side
    659,664,006.20x = 622,819,381,688,934,784
  5. Step 5: Solve for x
    x = 622,819,381,688,934,784/659,664,006.20
  6. Step 6: Final answer
    x = 944,146,377.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.