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Finding the Fourth Proportional to 956.38, 1,318.58 and 641.14

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Solution

The fourth proportional to 956.38, 1,318.58 and 641.14 is: 883.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.38 : 1,318.58 = 641.14 : x
  2. Step 2: Convert to fraction form
    956.38/1,318.58 = 641.14/x
  3. Step 3: Cross multiply
    956.38x = 1,318.58 × 641.14
  4. Step 4: Simplify right side
    956.38x = 845,393.99
  5. Step 5: Solve for x
    x = 845,393.99/956.38
  6. Step 6: Final answer
    x = 883.96

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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.