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Finding the Fourth Proportional to 485,521.62, 728,386.38 and 169,988.82

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Solution

The fourth proportional to 485,521.62, 728,386.38 and 169,988.82 is: 255,019.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,521.62 : 728,386.38 = 169,988.82 : x
  2. Step 2: Convert to fraction form
    485,521.62/728,386.38 = 169,988.82/x
  3. Step 3: Cross multiply
    485,521.62x = 728,386.38 × 169,988.82
  4. Step 4: Simplify right side
    485,521.62x = 123,817,541,240.27
  5. Step 5: Solve for x
    x = 123,817,541,240.27/485,521.62
  6. Step 6: Final answer
    x = 255,019.62

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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.