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Finding the Fourth Proportional to 1,658.27, 2,487.39 and 425.68

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Solution

The fourth proportional to 1,658.27, 2,487.39 and 425.68 is: 638.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.27 : 2,487.39 = 425.68 : x
  2. Step 2: Convert to fraction form
    1,658.27/2,487.39 = 425.68/x
  3. Step 3: Cross multiply
    1,658.27x = 2,487.39 × 425.68
  4. Step 4: Simplify right side
    1,658.27x = 1,058,832.18
  5. Step 5: Solve for x
    x = 1,058,832.18/1,658.27
  6. Step 6: Final answer
    x = 638.52

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Double scale
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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.