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Finding the Fourth Proportional to 521.08, 719.13 and 285.04

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Solution

The fourth proportional to 521.08, 719.13 and 285.04 is: 393.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.08 : 719.13 = 285.04 : x
  2. Step 2: Convert to fraction form
    521.08/719.13 = 285.04/x
  3. Step 3: Cross multiply
    521.08x = 719.13 × 285.04
  4. Step 4: Simplify right side
    521.08x = 204,983.20
  5. Step 5: Solve for x
    x = 204,983.20/521.08
  6. Step 6: Final answer
    x = 393.38

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.