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Finding the Fourth Proportional to 390,910.92, 539,362.98 and 229,753.32

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Solution

The fourth proportional to 390,910.92, 539,362.98 and 229,753.32 is: 317,004.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,910.92 : 539,362.98 = 229,753.32 : x
  2. Step 2: Convert to fraction form
    390,910.92/539,362.98 = 229,753.32/x
  3. Step 3: Cross multiply
    390,910.92x = 539,362.98 × 229,753.32
  4. Step 4: Simplify right side
    390,910.92x = 123,920,435,340.09
  5. Step 5: Solve for x
    x = 123,920,435,340.09/390,910.92
  6. Step 6: Final answer
    x = 317,004.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.