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Finding the Fourth Proportional to 485,705.91, 728,117.80 and 169,990.59

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Solution

The fourth proportional to 485,705.91, 728,117.80 and 169,990.59 is: 254,831.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,705.91 : 728,117.80 = 169,990.59 : x
  2. Step 2: Convert to fraction form
    485,705.91/728,117.80 = 169,990.59/x
  3. Step 3: Cross multiply
    485,705.91x = 728,117.80 × 169,990.59
  4. Step 4: Simplify right side
    485,705.91x = 123,773,174,411.50
  5. Step 5: Solve for x
    x = 123,773,174,411.50/485,705.91
  6. Step 6: Final answer
    x = 254,831.52

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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.