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Finding the Fourth Proportional to 964.47, 1,330.55 and 591.43

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Solution

The fourth proportional to 964.47, 1,330.55 and 591.43 is: 815.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.47 : 1,330.55 = 591.43 : x
  2. Step 2: Convert to fraction form
    964.47/1,330.55 = 591.43/x
  3. Step 3: Cross multiply
    964.47x = 1,330.55 × 591.43
  4. Step 4: Simplify right side
    964.47x = 786,920.90
  5. Step 5: Solve for x
    x = 786,920.90/964.47
  6. Step 6: Final answer
    x = 815.91

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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.