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Finding the Fourth Proportional to 649.51, 974.10 and 187.18

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Solution

The fourth proportional to 649.51, 974.10 and 187.18 is: 280.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.51 : 974.10 = 187.18 : x
  2. Step 2: Convert to fraction form
    649.51/974.10 = 187.18/x
  3. Step 3: Cross multiply
    649.51x = 974.10 × 187.18
  4. Step 4: Simplify right side
    649.51x = 182,332.04
  5. Step 5: Solve for x
    x = 182,332.04/649.51
  6. Step 6: Final answer
    x = 280.72

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.