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Finding the Fourth Proportional to 521.15, 719.30 and 344.14

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Solution

The fourth proportional to 521.15, 719.30 and 344.14 is: 474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.15 : 719.30 = 344.14 : x
  2. Step 2: Convert to fraction form
    521.15/719.30 = 344.14/x
  3. Step 3: Cross multiply
    521.15x = 719.30 × 344.14
  4. Step 4: Simplify right side
    521.15x = 247,536.38
  5. Step 5: Solve for x
    x = 247,536.38/521.15
  6. Step 6: Final answer
    x = 474.99

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Double scale
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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.