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Finding the Fourth Proportional to 649.77, 974.07 and 284.36

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Solution

The fourth proportional to 649.77, 974.07 and 284.36 is: 426.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.77 : 974.07 = 284.36 : x
  2. Step 2: Convert to fraction form
    649.77/974.07 = 284.36/x
  3. Step 3: Cross multiply
    649.77x = 974.07 × 284.36
  4. Step 4: Simplify right side
    649.77x = 276,986.55
  5. Step 5: Solve for x
    x = 276,986.55/649.77
  6. Step 6: Final answer
    x = 426.28

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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.