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Finding the Fourth Proportional to 963.94, 1,445.97 and 386.81

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Solution

The fourth proportional to 963.94, 1,445.97 and 386.81 is: 580.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.94 : 1,445.97 = 386.81 : x
  2. Step 2: Convert to fraction form
    963.94/1,445.97 = 386.81/x
  3. Step 3: Cross multiply
    963.94x = 1,445.97 × 386.81
  4. Step 4: Simplify right side
    963.94x = 559,320.72
  5. Step 5: Solve for x
    x = 559,320.72/963.94
  6. Step 6: Final answer
    x = 580.25

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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.