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Finding the Fourth Proportional to 398,833.68, 550,397.04 and 217,545.60

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Solution

The fourth proportional to 398,833.68, 550,397.04 and 217,545.60 is: 300,216.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,833.68 : 550,397.04 = 217,545.60 : x
  2. Step 2: Convert to fraction form
    398,833.68/550,397.04 = 217,545.60/x
  3. Step 3: Cross multiply
    398,833.68x = 550,397.04 × 217,545.60
  4. Step 4: Simplify right side
    398,833.68x = 119,736,454,305.02
  5. Step 5: Solve for x
    x = 119,736,454,305.02/398,833.68
  6. Step 6: Final answer
    x = 300,216.51

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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.