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Finding the Fourth Proportional to 711.92, 982.08 and 618.46

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Solution

The fourth proportional to 711.92, 982.08 and 618.46 is: 853.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.92 : 982.08 = 618.46 : x
  2. Step 2: Convert to fraction form
    711.92/982.08 = 618.46/x
  3. Step 3: Cross multiply
    711.92x = 982.08 × 618.46
  4. Step 4: Simplify right side
    711.92x = 607,374.74
  5. Step 5: Solve for x
    x = 607,374.74/711.92
  6. Step 6: Final answer
    x = 853.15

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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.