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Finding the Fourth Proportional to 1,322.67, 1,981.58 and 1,176.87

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Solution

The fourth proportional to 1,322.67, 1,981.58 and 1,176.87 is: 1,763.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.67 : 1,981.58 = 1,176.87 : x
  2. Step 2: Convert to fraction form
    1,322.67/1,981.58 = 1,176.87/x
  3. Step 3: Cross multiply
    1,322.67x = 1,981.58 × 1,176.87
  4. Step 4: Simplify right side
    1,322.67x = 2,332,056.17
  5. Step 5: Solve for x
    x = 2,332,056.17/1,322.67
  6. Step 6: Final answer
    x = 1,763.14

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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.