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Finding the Fourth Proportional to 402,750.91, 555,781.31 and 221,452.05

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Solution

The fourth proportional to 402,750.91, 555,781.31 and 221,452.05 is: 305,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,750.91 : 555,781.31 = 221,452.05 : x
  2. Step 2: Convert to fraction form
    402,750.91/555,781.31 = 221,452.05/x
  3. Step 3: Cross multiply
    402,750.91x = 555,781.31 × 221,452.05
  4. Step 4: Simplify right side
    402,750.91x = 123,078,906,565.02
  5. Step 5: Solve for x
    x = 123,078,906,565.02/402,750.91
  6. Step 6: Final answer
    x = 305,595.60

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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.