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Finding the Fourth Proportional to 964.71, 1,330.79 and 591.39

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Solution

The fourth proportional to 964.71, 1,330.79 and 591.39 is: 815.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.71 : 1,330.79 = 591.39 : x
  2. Step 2: Convert to fraction form
    964.71/1,330.79 = 591.39/x
  3. Step 3: Cross multiply
    964.71x = 1,330.79 × 591.39
  4. Step 4: Simplify right side
    964.71x = 787,012.94
  5. Step 5: Solve for x
    x = 787,012.94/964.71
  6. Step 6: Final answer
    x = 815.80

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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.