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Finding the Fourth Proportional to 844.52, 1,158.40 and 830.76

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Solution

The fourth proportional to 844.52, 1,158.40 and 830.76 is: 1,139.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.52 : 1,158.40 = 830.76 : x
  2. Step 2: Convert to fraction form
    844.52/1,158.40 = 830.76/x
  3. Step 3: Cross multiply
    844.52x = 1,158.40 × 830.76
  4. Step 4: Simplify right side
    844.52x = 962,352.38
  5. Step 5: Solve for x
    x = 962,352.38/844.52
  6. Step 6: Final answer
    x = 1,139.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.