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Finding the Fourth Proportional to 964.11, 1,330.29 and 591.15

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Solution

The fourth proportional to 964.11, 1,330.29 and 591.15 is: 815.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.11 : 1,330.29 = 591.15 : x
  2. Step 2: Convert to fraction form
    964.11/1,330.29 = 591.15/x
  3. Step 3: Cross multiply
    964.11x = 1,330.29 × 591.15
  4. Step 4: Simplify right side
    964.11x = 786,400.93
  5. Step 5: Solve for x
    x = 786,400.93/964.11
  6. Step 6: Final answer
    x = 815.68

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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.