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Finding the Fourth Proportional to 996.10, 1,374.71 and 554.11

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Solution

The fourth proportional to 996.10, 1,374.71 and 554.11 is: 764.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.10 : 1,374.71 = 554.11 : x
  2. Step 2: Convert to fraction form
    996.10/1,374.71 = 554.11/x
  3. Step 3: Cross multiply
    996.10x = 1,374.71 × 554.11
  4. Step 4: Simplify right side
    996.10x = 761,734.35
  5. Step 5: Solve for x
    x = 761,734.35/996.10
  6. Step 6: Final answer
    x = 764.72

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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.