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Finding the Fourth Proportional to 783.27, 1,174.13 and 372.70

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Solution

The fourth proportional to 783.27, 1,174.13 and 372.70 is: 558.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.27 : 1,174.13 = 372.70 : x
  2. Step 2: Convert to fraction form
    783.27/1,174.13 = 372.70/x
  3. Step 3: Cross multiply
    783.27x = 1,174.13 × 372.70
  4. Step 4: Simplify right side
    783.27x = 437,599.25
  5. Step 5: Solve for x
    x = 437,599.25/783.27
  6. Step 6: Final answer
    x = 558.68

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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.