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Finding the Fourth Proportional to 713.95, 987.94 and 608.87

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Solution

The fourth proportional to 713.95, 987.94 and 608.87 is: 842.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.95 : 987.94 = 608.87 : x
  2. Step 2: Convert to fraction form
    713.95/987.94 = 608.87/x
  3. Step 3: Cross multiply
    713.95x = 987.94 × 608.87
  4. Step 4: Simplify right side
    713.95x = 601,520.57
  5. Step 5: Solve for x
    x = 601,520.57/713.95
  6. Step 6: Final answer
    x = 842.53

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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.