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Finding the Fourth Proportional to 935.98, 1,400.70 and 769.44

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Solution

The fourth proportional to 935.98, 1,400.70 and 769.44 is: 1,151.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.98 : 1,400.70 = 769.44 : x
  2. Step 2: Convert to fraction form
    935.98/1,400.70 = 769.44/x
  3. Step 3: Cross multiply
    935.98x = 1,400.70 × 769.44
  4. Step 4: Simplify right side
    935.98x = 1,077,754.61
  5. Step 5: Solve for x
    x = 1,077,754.61/935.98
  6. Step 6: Final answer
    x = 1,151.47

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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.