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Finding the Fourth Proportional to 749.90, 1,124.78 and 333.56

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Solution

The fourth proportional to 749.90, 1,124.78 and 333.56 is: 500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.90 : 1,124.78 = 333.56 : x
  2. Step 2: Convert to fraction form
    749.90/1,124.78 = 333.56/x
  3. Step 3: Cross multiply
    749.90x = 1,124.78 × 333.56
  4. Step 4: Simplify right side
    749.90x = 375,174.33
  5. Step 5: Solve for x
    x = 375,174.33/749.90
  6. Step 6: Final answer
    x = 500.30

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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.