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Finding the Fourth Proportional to 485,313.12, 728,073.36 and 169,780.32

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Solution

The fourth proportional to 485,313.12, 728,073.36 and 169,780.32 is: 254,706.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,313.12 : 728,073.36 = 169,780.32 : x
  2. Step 2: Convert to fraction form
    485,313.12/728,073.36 = 169,780.32/x
  3. Step 3: Cross multiply
    485,313.12x = 728,073.36 × 169,780.32
  4. Step 4: Simplify right side
    485,313.12x = 123,612,528,044.28
  5. Step 5: Solve for x
    x = 123,612,528,044.28/485,313.12
  6. Step 6: Final answer
    x = 254,706.75

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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.