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Finding the Fourth Proportional to 749.97, 1,124.96 and 316.85

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Solution

The fourth proportional to 749.97, 1,124.96 and 316.85 is: 475.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.97 : 1,124.96 = 316.85 : x
  2. Step 2: Convert to fraction form
    749.97/1,124.96 = 316.85/x
  3. Step 3: Cross multiply
    749.97x = 1,124.96 × 316.85
  4. Step 4: Simplify right side
    749.97x = 356,436.37
  5. Step 5: Solve for x
    x = 356,436.37/749.97
  6. Step 6: Final answer
    x = 475.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.