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Finding the Fourth Proportional to 963.76, 1,445.84 and 386.68

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Solution

The fourth proportional to 963.76, 1,445.84 and 386.68 is: 580.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.76 : 1,445.84 = 386.68 : x
  2. Step 2: Convert to fraction form
    963.76/1,445.84 = 386.68/x
  3. Step 3: Cross multiply
    963.76x = 1,445.84 × 386.68
  4. Step 4: Simplify right side
    963.76x = 559,077.41
  5. Step 5: Solve for x
    x = 559,077.41/963.76
  6. Step 6: Final answer
    x = 580.10

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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.