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Finding the Fourth Proportional to 963.09, 1,330.43 and 766.35

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Solution

The fourth proportional to 963.09, 1,330.43 and 766.35 is: 1,058.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.09 : 1,330.43 = 766.35 : x
  2. Step 2: Convert to fraction form
    963.09/1,330.43 = 766.35/x
  3. Step 3: Cross multiply
    963.09x = 1,330.43 × 766.35
  4. Step 4: Simplify right side
    963.09x = 1,019,571.20
  5. Step 5: Solve for x
    x = 1,019,571.20/963.09
  6. Step 6: Final answer
    x = 1,058.65

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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.