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Finding the Fourth Proportional to 428,355.16, 591,133.65 and 237,371.74

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Solution

The fourth proportional to 428,355.16, 591,133.65 and 237,371.74 is: 327,574.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,355.16 : 591,133.65 = 237,371.74 : x
  2. Step 2: Convert to fraction form
    428,355.16/591,133.65 = 237,371.74/x
  3. Step 3: Cross multiply
    428,355.16x = 591,133.65 × 237,371.74
  4. Step 4: Simplify right side
    428,355.16x = 140,318,423,073.05
  5. Step 5: Solve for x
    x = 140,318,423,073.05/428,355.16
  6. Step 6: Final answer
    x = 327,574.96

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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.