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Finding the Fourth Proportional to 716.63, 987.73 and 591.89

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Solution

The fourth proportional to 716.63, 987.73 and 591.89 is: 815.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.63 : 987.73 = 591.89 : x
  2. Step 2: Convert to fraction form
    716.63/987.73 = 591.89/x
  3. Step 3: Cross multiply
    716.63x = 987.73 × 591.89
  4. Step 4: Simplify right side
    716.63x = 584,621.09
  5. Step 5: Solve for x
    x = 584,621.09/716.63
  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.