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Finding the Fourth Proportional to 964.53, 1,439.82 and 847.76

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Solution

The fourth proportional to 964.53, 1,439.82 and 847.76 is: 1,265.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.53 : 1,439.82 = 847.76 : x
  2. Step 2: Convert to fraction form
    964.53/1,439.82 = 847.76/x
  3. Step 3: Cross multiply
    964.53x = 1,439.82 × 847.76
  4. Step 4: Simplify right side
    964.53x = 1,220,621.80
  5. Step 5: Solve for x
    x = 1,220,621.80/964.53
  6. Step 6: Final answer
    x = 1,265.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.