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Finding the Fourth Proportional to 996.32, 1,374.86 and 554.20

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Solution

The fourth proportional to 996.32, 1,374.86 and 554.20 is: 764.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.32 : 1,374.86 = 554.20 : x
  2. Step 2: Convert to fraction form
    996.32/1,374.86 = 554.20/x
  3. Step 3: Cross multiply
    996.32x = 1,374.86 × 554.20
  4. Step 4: Simplify right side
    996.32x = 761,947.41
  5. Step 5: Solve for x
    x = 761,947.41/996.32
  6. Step 6: Final answer
    x = 764.76

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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.