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Finding the Fourth Proportional to 663.16, 914.84 and 497.38

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Solution

The fourth proportional to 663.16, 914.84 and 497.38 is: 686.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.16 : 914.84 = 497.38 : x
  2. Step 2: Convert to fraction form
    663.16/914.84 = 497.38/x
  3. Step 3: Cross multiply
    663.16x = 914.84 × 497.38
  4. Step 4: Simplify right side
    663.16x = 455,023.12
  5. Step 5: Solve for x
    x = 455,023.12/663.16
  6. Step 6: Final answer
    x = 686.14

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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.