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Finding the Fourth Proportional to 605,220.30, 907,830.45 and 392,643.90

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Solution

The fourth proportional to 605,220.30, 907,830.45 and 392,643.90 is: 588,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,220.30 : 907,830.45 = 392,643.90 : x
  2. Step 2: Convert to fraction form
    605,220.30/907,830.45 = 392,643.90/x
  3. Step 3: Cross multiply
    605,220.30x = 907,830.45 × 392,643.90
  4. Step 4: Simplify right side
    605,220.30x = 356,454,088,426.76
  5. Step 5: Solve for x
    x = 356,454,088,426.76/605,220.30
  6. Step 6: Final answer
    x = 588,965.85

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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.