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Finding the Fourth Proportional to 1,049.39, 1,573.31 and 432.87

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Solution

The fourth proportional to 1,049.39, 1,573.31 and 432.87 is: 648.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.39 : 1,573.31 = 432.87 : x
  2. Step 2: Convert to fraction form
    1,049.39/1,573.31 = 432.87/x
  3. Step 3: Cross multiply
    1,049.39x = 1,573.31 × 432.87
  4. Step 4: Simplify right side
    1,049.39x = 681,038.70
  5. Step 5: Solve for x
    x = 681,038.70/1,049.39
  6. Step 6: Final answer
    x = 648.99

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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.