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Finding the Fourth Proportional to 402,767.30, 555,799.85 and 221,486.87

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Solution

The fourth proportional to 402,767.30, 555,799.85 and 221,486.87 is: 305,641.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,767.30 : 555,799.85 = 221,486.87 : x
  2. Step 2: Convert to fraction form
    402,767.30/555,799.85 = 221,486.87/x
  3. Step 3: Cross multiply
    402,767.30x = 555,799.85 × 221,486.87
  4. Step 4: Simplify right side
    402,767.30x = 123,102,369,122.97
  5. Step 5: Solve for x
    x = 123,102,369,122.97/402,767.30
  6. Step 6: Final answer
    x = 305,641.42

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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.