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Finding the Fourth Proportional to 521.01, 719.28 and 353.08

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Solution

The fourth proportional to 521.01, 719.28 and 353.08 is: 487.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.01 : 719.28 = 353.08 : x
  2. Step 2: Convert to fraction form
    521.01/719.28 = 353.08/x
  3. Step 3: Cross multiply
    521.01x = 719.28 × 353.08
  4. Step 4: Simplify right side
    521.01x = 253,963.38
  5. Step 5: Solve for x
    x = 253,963.38/521.01
  6. Step 6: Final answer
    x = 487.44

Related Problems

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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.