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Finding the Fourth Proportional to 1,711.70, 2,567.54 and 980.76

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Solution

The fourth proportional to 1,711.70, 2,567.54 and 980.76 is: 1,471.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.70 : 2,567.54 = 980.76 : x
  2. Step 2: Convert to fraction form
    1,711.70/2,567.54 = 980.76/x
  3. Step 3: Cross multiply
    1,711.70x = 2,567.54 × 980.76
  4. Step 4: Simplify right side
    1,711.70x = 2,518,142.98
  5. Step 5: Solve for x
    x = 2,518,142.98/1,711.70
  6. Step 6: Final answer
    x = 1,471.14

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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.