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Finding the Fourth Proportional to 402,726.55, 555,748.41 and 221,437.21

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Solution

The fourth proportional to 402,726.55, 555,748.41 and 221,437.21 is: 305,575.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,726.55 : 555,748.41 = 221,437.21 : x
  2. Step 2: Convert to fraction form
    402,726.55/555,748.41 = 221,437.21/x
  3. Step 3: Cross multiply
    402,726.55x = 555,748.41 × 221,437.21
  4. Step 4: Simplify right side
    402,726.55x = 123,063,374,593.59
  5. Step 5: Solve for x
    x = 123,063,374,593.59/402,726.55
  6. Step 6: Final answer
    x = 305,575.52

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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.