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Finding the Fourth Proportional to 287,321.38, 430,686.35 and 127,472.59

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Solution

The fourth proportional to 287,321.38, 430,686.35 and 127,472.59 is: 191,077.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,321.38 : 430,686.35 = 127,472.59 : x
  2. Step 2: Convert to fraction form
    287,321.38/430,686.35 = 127,472.59/x
  3. Step 3: Cross multiply
    287,321.38x = 430,686.35 × 127,472.59
  4. Step 4: Simplify right side
    287,321.38x = 54,900,704,512.15
  5. Step 5: Solve for x
    x = 54,900,704,512.15/287,321.38
  6. Step 6: Final answer
    x = 191,077.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.