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Finding the Fourth Proportional to 485,663.53, 728,561.71 and 165,729.35

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Solution

The fourth proportional to 485,663.53, 728,561.71 and 165,729.35 is: 248,616.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,663.53 : 728,561.71 = 165,729.35 : x
  2. Step 2: Convert to fraction form
    485,663.53/728,561.71 = 165,729.35/x
  3. Step 3: Cross multiply
    485,663.53x = 728,561.71 × 165,729.35
  4. Step 4: Simplify right side
    485,663.53x = 120,744,058,633.19
  5. Step 5: Solve for x
    x = 120,744,058,633.19/485,663.53
  6. Step 6: Final answer
    x = 248,616.69

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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.