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Finding the Fourth Proportional to 522.41, 721.05 and 345.38

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Solution

The fourth proportional to 522.41, 721.05 and 345.38 is: 476.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.41 : 721.05 = 345.38 : x
  2. Step 2: Convert to fraction form
    522.41/721.05 = 345.38/x
  3. Step 3: Cross multiply
    522.41x = 721.05 × 345.38
  4. Step 4: Simplify right side
    522.41x = 249,032.64
  5. Step 5: Solve for x
    x = 249,032.64/522.41
  6. Step 6: Final answer
    x = 476.70

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.