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Finding the Fourth Proportional to 506.77, 760.17 and 391.39

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Solution

The fourth proportional to 506.77, 760.17 and 391.39 is: 587.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.77 : 760.17 = 391.39 : x
  2. Step 2: Convert to fraction form
    506.77/760.17 = 391.39/x
  3. Step 3: Cross multiply
    506.77x = 760.17 × 391.39
  4. Step 4: Simplify right side
    506.77x = 297,522.94
  5. Step 5: Solve for x
    x = 297,522.94/506.77
  6. Step 6: Final answer
    x = 587.10

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.