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Finding the Fourth Proportional to 428,366.68, 591,138.93 and 234,772.90

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Solution

The fourth proportional to 428,366.68, 591,138.93 and 234,772.90 is: 323,982.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,366.68 : 591,138.93 = 234,772.90 : x
  2. Step 2: Convert to fraction form
    428,366.68/591,138.93 = 234,772.90/x
  3. Step 3: Cross multiply
    428,366.68x = 591,138.93 × 234,772.90
  4. Step 4: Simplify right side
    428,366.68x = 138,783,400,899.00
  5. Step 5: Solve for x
    x = 138,783,400,899.00/428,366.68
  6. Step 6: Final answer
    x = 323,982.72

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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.