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Finding the Fourth Proportional to 605,429.40, 908,144.10 and 392,539.80

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Solution

The fourth proportional to 605,429.40, 908,144.10 and 392,539.80 is: 588,809.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,429.40 : 908,144.10 = 392,539.80 : x
  2. Step 2: Convert to fraction form
    605,429.40/908,144.10 = 392,539.80/x
  3. Step 3: Cross multiply
    605,429.40x = 908,144.10 × 392,539.80
  4. Step 4: Simplify right side
    605,429.40x = 356,482,703,385.18
  5. Step 5: Solve for x
    x = 356,482,703,385.18/605,429.40
  6. Step 6: Final answer
    x = 588,809.70

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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.