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Finding the Fourth Proportional to 681.04, 939.36 and 514.72

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Solution

The fourth proportional to 681.04, 939.36 and 514.72 is: 709.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.04 : 939.36 = 514.72 : x
  2. Step 2: Convert to fraction form
    681.04/939.36 = 514.72/x
  3. Step 3: Cross multiply
    681.04x = 939.36 × 514.72
  4. Step 4: Simplify right side
    681.04x = 483,507.38
  5. Step 5: Solve for x
    x = 483,507.38/681.04
  6. Step 6: Final answer
    x = 709.95

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Half scale
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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.