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Finding the Fourth Proportional to 504.20, 756.24 and 139.02

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Solution

The fourth proportional to 504.20, 756.24 and 139.02 is: 208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.20 : 756.24 = 139.02 : x
  2. Step 2: Convert to fraction form
    504.20/756.24 = 139.02/x
  3. Step 3: Cross multiply
    504.20x = 756.24 × 139.02
  4. Step 4: Simplify right side
    504.20x = 105,132.48
  5. Step 5: Solve for x
    x = 105,132.48/504.20
  6. Step 6: Final answer
    x = 208.51

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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.