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Finding the Fourth Proportional to 428,717.67, 591,679.16 and 247,478.23

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Solution

The fourth proportional to 428,717.67, 591,679.16 and 247,478.23 is: 341,548.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,717.67 : 591,679.16 = 247,478.23 : x
  2. Step 2: Convert to fraction form
    428,717.67/591,679.16 = 247,478.23/x
  3. Step 3: Cross multiply
    428,717.67x = 591,679.16 × 247,478.23
  4. Step 4: Simplify right side
    428,717.67x = 146,427,711,244.69
  5. Step 5: Solve for x
    x = 146,427,711,244.69/428,717.67
  6. Step 6: Final answer
    x = 341,548.11

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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.