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Finding the Fourth Proportional to 521.40, 720.26 and 462.52

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Solution

The fourth proportional to 521.40, 720.26 and 462.52 is: 638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.40 : 720.26 = 462.52 : x
  2. Step 2: Convert to fraction form
    521.40/720.26 = 462.52/x
  3. Step 3: Cross multiply
    521.40x = 720.26 × 462.52
  4. Step 4: Simplify right side
    521.40x = 333,134.66
  5. Step 5: Solve for x
    x = 333,134.66/521.40
  6. Step 6: Final answer
    x = 638.92

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.