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Finding the Fourth Proportional to 687.02, 948.17 and 477.14

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Solution

The fourth proportional to 687.02, 948.17 and 477.14 is: 658.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.02 : 948.17 = 477.14 : x
  2. Step 2: Convert to fraction form
    687.02/948.17 = 477.14/x
  3. Step 3: Cross multiply
    687.02x = 948.17 × 477.14
  4. Step 4: Simplify right side
    687.02x = 452,407.45
  5. Step 5: Solve for x
    x = 452,407.45/687.02
  6. Step 6: Final answer
    x = 658.51

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