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Finding the Fourth Proportional to 898.17, 1,240.37 and 713.61

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Solution

The fourth proportional to 898.17, 1,240.37 and 713.61 is: 985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.17 : 1,240.37 = 713.61 : x
  2. Step 2: Convert to fraction form
    898.17/1,240.37 = 713.61/x
  3. Step 3: Cross multiply
    898.17x = 1,240.37 × 713.61
  4. Step 4: Simplify right side
    898.17x = 885,140.44
  5. Step 5: Solve for x
    x = 885,140.44/898.17
  6. Step 6: Final answer
    x = 985.49

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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.