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Finding the Fourth Proportional to 428,562.74, 591,421.97 and 247,312.28

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Solution

The fourth proportional to 428,562.74, 591,421.97 and 247,312.28 is: 341,294.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,562.74 : 591,421.97 = 247,312.28 : x
  2. Step 2: Convert to fraction form
    428,562.74/591,421.97 = 247,312.28/x
  3. Step 3: Cross multiply
    428,562.74x = 591,421.97 × 247,312.28
  4. Step 4: Simplify right side
    428,562.74x = 146,265,915,842.79
  5. Step 5: Solve for x
    x = 146,265,915,842.79/428,562.74
  6. Step 6: Final answer
    x = 341,294.06

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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.