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Finding the Fourth Proportional to 428,718.17, 591,679.85 and 247,478.73

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Solution

The fourth proportional to 428,718.17, 591,679.85 and 247,478.73 is: 341,548.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,718.17 : 591,679.85 = 247,478.73 : x
  2. Step 2: Convert to fraction form
    428,718.17/591,679.85 = 247,478.73/x
  3. Step 3: Cross multiply
    428,718.17x = 591,679.85 × 247,478.73
  4. Step 4: Simplify right side
    428,718.17x = 146,428,176,607.20
  5. Step 5: Solve for x
    x = 146,428,176,607.20/428,718.17
  6. Step 6: Final answer
    x = 341,548.80

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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.