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Finding the Fourth Proportional to 672.38, 927.14 and 423.40

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Solution

The fourth proportional to 672.38, 927.14 and 423.40 is: 583.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.38 : 927.14 = 423.40 : x
  2. Step 2: Convert to fraction form
    672.38/927.14 = 423.40/x
  3. Step 3: Cross multiply
    672.38x = 927.14 × 423.40
  4. Step 4: Simplify right side
    672.38x = 392,551.08
  5. Step 5: Solve for x
    x = 392,551.08/672.38
  6. Step 6: Final answer
    x = 583.82

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1.5x scale

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.