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Finding the Fourth Proportional to 749.20, 1,038.56 and 735.72

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Solution

The fourth proportional to 749.20, 1,038.56 and 735.72 is: 1,019.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.20 : 1,038.56 = 735.72 : x
  2. Step 2: Convert to fraction form
    749.20/1,038.56 = 735.72/x
  3. Step 3: Cross multiply
    749.20x = 1,038.56 × 735.72
  4. Step 4: Simplify right side
    749.20x = 764,089.36
  5. Step 5: Solve for x
    x = 764,089.36/749.20
  6. Step 6: Final answer
    x = 1,019.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.