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Finding the Fourth Proportional to 963.81, 1,329.75 and 570.76

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Solution

The fourth proportional to 963.81, 1,329.75 and 570.76 is: 787.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.81 : 1,329.75 = 570.76 : x
  2. Step 2: Convert to fraction form
    963.81/1,329.75 = 570.76/x
  3. Step 3: Cross multiply
    963.81x = 1,329.75 × 570.76
  4. Step 4: Simplify right side
    963.81x = 758,968.11
  5. Step 5: Solve for x
    x = 758,968.11/963.81
  6. Step 6: Final answer
    x = 787.47

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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.