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Finding the Fourth Proportional to 867.74, 1,196.35 and 631.73

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Solution

The fourth proportional to 867.74, 1,196.35 and 631.73 is: 870.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.74 : 1,196.35 = 631.73 : x
  2. Step 2: Convert to fraction form
    867.74/1,196.35 = 631.73/x
  3. Step 3: Cross multiply
    867.74x = 1,196.35 × 631.73
  4. Step 4: Simplify right side
    867.74x = 755,764.20
  5. Step 5: Solve for x
    x = 755,764.20/867.74
  6. Step 6: Final answer
    x = 870.96

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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.