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Finding the Fourth Proportional to 979.98, 1,352.37 and 537.89

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Solution

The fourth proportional to 979.98, 1,352.37 and 537.89 is: 742.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.98 : 1,352.37 = 537.89 : x
  2. Step 2: Convert to fraction form
    979.98/1,352.37 = 537.89/x
  3. Step 3: Cross multiply
    979.98x = 1,352.37 × 537.89
  4. Step 4: Simplify right side
    979.98x = 727,419.54
  5. Step 5: Solve for x
    x = 727,419.54/979.98
  6. Step 6: Final answer
    x = 742.28

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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.