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Finding the Fourth Proportional to 611,930.52, 917,116.92 and 345,839.40

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Solution

The fourth proportional to 611,930.52, 917,116.92 and 345,839.40 is: 518,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,930.52 : 917,116.92 = 345,839.40 : x
  2. Step 2: Convert to fraction form
    611,930.52/917,116.92 = 345,839.40/x
  3. Step 3: Cross multiply
    611,930.52x = 917,116.92 × 345,839.40
  4. Step 4: Simplify right side
    611,930.52x = 317,175,165,342.65
  5. Step 5: Solve for x
    x = 317,175,165,342.65/611,930.52
  6. Step 6: Final answer
    x = 518,318.92

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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.