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Finding the Fourth Proportional to 1,658.23, 2,487.28 and 425.65

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Solution

The fourth proportional to 1,658.23, 2,487.28 and 425.65 is: 638.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.23 : 2,487.28 = 425.65 : x
  2. Step 2: Convert to fraction form
    1,658.23/2,487.28 = 425.65/x
  3. Step 3: Cross multiply
    1,658.23x = 2,487.28 × 425.65
  4. Step 4: Simplify right side
    1,658.23x = 1,058,710.73
  5. Step 5: Solve for x
    x = 1,058,710.73/1,658.23
  6. Step 6: Final answer
    x = 638.46

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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.