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Finding the Fourth Proportional to 758.67, 1,138.10 and 368.88

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Solution

The fourth proportional to 758.67, 1,138.10 and 368.88 is: 553.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.67 : 1,138.10 = 368.88 : x
  2. Step 2: Convert to fraction form
    758.67/1,138.10 = 368.88/x
  3. Step 3: Cross multiply
    758.67x = 1,138.10 × 368.88
  4. Step 4: Simplify right side
    758.67x = 419,820.48
  5. Step 5: Solve for x
    x = 419,820.48/758.67
  6. Step 6: Final answer
    x = 553.36

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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.