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Finding the Fourth Proportional to 1,776.11, 2,660.76 and 993.74

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Solution

The fourth proportional to 1,776.11, 2,660.76 and 993.74 is: 1,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.11 : 2,660.76 = 993.74 : x
  2. Step 2: Convert to fraction form
    1,776.11/2,660.76 = 993.74/x
  3. Step 3: Cross multiply
    1,776.11x = 2,660.76 × 993.74
  4. Step 4: Simplify right side
    1,776.11x = 2,644,096.59
  5. Step 5: Solve for x
    x = 2,644,096.59/1,776.11
  6. Step 6: Final answer
    x = 1,488.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.