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Finding the Fourth Proportional to 979.54, 1,351.77 and 537.45

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Solution

The fourth proportional to 979.54, 1,351.77 and 537.45 is: 741.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.54 : 1,351.77 = 537.45 : x
  2. Step 2: Convert to fraction form
    979.54/1,351.77 = 537.45/x
  3. Step 3: Cross multiply
    979.54x = 1,351.77 × 537.45
  4. Step 4: Simplify right side
    979.54x = 726,508.79
  5. Step 5: Solve for x
    x = 726,508.79/979.54
  6. Step 6: Final answer
    x = 741.68

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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.