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Finding the Fourth Proportional to 659,612.20, 989,122.65 and 260,047.30

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Solution

The fourth proportional to 659,612.20, 989,122.65 and 260,047.30 is: 389,954.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,612.20 : 989,122.65 = 260,047.30 : x
  2. Step 2: Convert to fraction form
    659,612.20/989,122.65 = 260,047.30/x
  3. Step 3: Cross multiply
    659,612.20x = 989,122.65 × 260,047.30
  4. Step 4: Simplify right side
    659,612.20x = 257,218,674,501.35
  5. Step 5: Solve for x
    x = 257,218,674,501.35/659,612.20
  6. Step 6: Final answer
    x = 389,954.39

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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.