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Finding the Fourth Proportional to 903.10, 1,351.53 and 749.32

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Solution

The fourth proportional to 903.10, 1,351.53 and 749.32 is: 1,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.10 : 1,351.53 = 749.32 : x
  2. Step 2: Convert to fraction form
    903.10/1,351.53 = 749.32/x
  3. Step 3: Cross multiply
    903.10x = 1,351.53 × 749.32
  4. Step 4: Simplify right side
    903.10x = 1,012,728.46
  5. Step 5: Solve for x
    x = 1,012,728.46/903.10
  6. Step 6: Final answer
    x = 1,121.39

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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.