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Finding the Fourth Proportional to 725.21, 1,000.21 and 462.77

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Solution

The fourth proportional to 725.21, 1,000.21 and 462.77 is: 638.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.21 : 1,000.21 = 462.77 : x
  2. Step 2: Convert to fraction form
    725.21/1,000.21 = 462.77/x
  3. Step 3: Cross multiply
    725.21x = 1,000.21 × 462.77
  4. Step 4: Simplify right side
    725.21x = 462,867.18
  5. Step 5: Solve for x
    x = 462,867.18/725.21
  6. Step 6: Final answer
    x = 638.25

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.