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Finding the Fourth Proportional to 963.84, 1,445.28 and 477.12

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Solution

The fourth proportional to 963.84, 1,445.28 and 477.12 is: 715.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.84 : 1,445.28 = 477.12 : x
  2. Step 2: Convert to fraction form
    963.84/1,445.28 = 477.12/x
  3. Step 3: Cross multiply
    963.84x = 1,445.28 × 477.12
  4. Step 4: Simplify right side
    963.84x = 689,571.99
  5. Step 5: Solve for x
    x = 689,571.99/963.84
  6. Step 6: Final answer
    x = 715.44

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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.