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Finding the Fourth Proportional to 659,628.80, 989,443.20 and 622,887.20

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Solution

The fourth proportional to 659,628.80, 989,443.20 and 622,887.20 is: 934,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,628.80 : 989,443.20 = 622,887.20 : x
  2. Step 2: Convert to fraction form
    659,628.80/989,443.20 = 622,887.20/x
  3. Step 3: Cross multiply
    659,628.80x = 989,443.20 × 622,887.20
  4. Step 4: Simplify right side
    659,628.80x = 616,311,504,407.04
  5. Step 5: Solve for x
    x = 616,311,504,407.04/659,628.80
  6. Step 6: Final answer
    x = 934,330.80

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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.