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Finding the Fourth Proportional to 605,081.80, 907,622.70 and 392,505.40

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Solution

The fourth proportional to 605,081.80, 907,622.70 and 392,505.40 is: 588,758.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,081.80 : 907,622.70 = 392,505.40 : x
  2. Step 2: Convert to fraction form
    605,081.80/907,622.70 = 392,505.40/x
  3. Step 3: Cross multiply
    605,081.80x = 907,622.70 × 392,505.40
  4. Step 4: Simplify right side
    605,081.80x = 356,246,810,912.58
  5. Step 5: Solve for x
    x = 356,246,810,912.58/605,081.80
  6. Step 6: Final answer
    x = 588,758.10

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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.