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Finding the Fourth Proportional to 428,972.22, 592,009.70 and 247,691.79

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Solution

The fourth proportional to 428,972.22, 592,009.70 and 247,691.79 is: 341,830.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,972.22 : 592,009.70 = 247,691.79 : x
  2. Step 2: Convert to fraction form
    428,972.22/592,009.70 = 247,691.79/x
  3. Step 3: Cross multiply
    428,972.22x = 592,009.70 × 247,691.79
  4. Step 4: Simplify right side
    428,972.22x = 146,635,941,051.90
  5. Step 5: Solve for x
    x = 146,635,941,051.90/428,972.22
  6. Step 6: Final answer
    x = 341,830.86

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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.