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Finding the Fourth Proportional to 963.47, 1,329.81 and 570.76

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Solution

The fourth proportional to 963.47, 1,329.81 and 570.76 is: 787.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.47 : 1,329.81 = 570.76 : x
  2. Step 2: Convert to fraction form
    963.47/1,329.81 = 570.76/x
  3. Step 3: Cross multiply
    963.47x = 1,329.81 × 570.76
  4. Step 4: Simplify right side
    963.47x = 759,002.36
  5. Step 5: Solve for x
    x = 759,002.36/963.47
  6. Step 6: Final answer
    x = 787.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.