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Finding the Fourth Proportional to 963.72, 1,329.84 and 570.84

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Solution

The fourth proportional to 963.72, 1,329.84 and 570.84 is: 787.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.72 : 1,329.84 = 570.84 : x
  2. Step 2: Convert to fraction form
    963.72/1,329.84 = 570.84/x
  3. Step 3: Cross multiply
    963.72x = 1,329.84 × 570.84
  4. Step 4: Simplify right side
    963.72x = 759,125.87
  5. Step 5: Solve for x
    x = 759,125.87/963.72
  6. Step 6: Final answer
    x = 787.70

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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.