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Finding the Fourth Proportional to 963.10, 1,445.46 and 378.51

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Solution

The fourth proportional to 963.10, 1,445.46 and 378.51 is: 568.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.10 : 1,445.46 = 378.51 : x
  2. Step 2: Convert to fraction form
    963.10/1,445.46 = 378.51/x
  3. Step 3: Cross multiply
    963.10x = 1,445.46 × 378.51
  4. Step 4: Simplify right side
    963.10x = 547,114.78
  5. Step 5: Solve for x
    x = 547,114.78/963.10
  6. Step 6: Final answer
    x = 568.08

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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.