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Finding the Fourth Proportional to 816.02, 1,225.40 and 749.39

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Solution

The fourth proportional to 816.02, 1,225.40 and 749.39 is: 1,125.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.02 : 1,225.40 = 749.39 : x
  2. Step 2: Convert to fraction form
    816.02/1,225.40 = 749.39/x
  3. Step 3: Cross multiply
    816.02x = 1,225.40 × 749.39
  4. Step 4: Simplify right side
    816.02x = 918,304.12
  5. Step 5: Solve for x
    x = 918,304.12/816.02
  6. Step 6: Final answer
    x = 1,125.34

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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.