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Finding the Fourth Proportional to 1,180.28, 1,772.40 and 887.78

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Solution

The fourth proportional to 1,180.28, 1,772.40 and 887.78 is: 1,333.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.28 : 1,772.40 = 887.78 : x
  2. Step 2: Convert to fraction form
    1,180.28/1,772.40 = 887.78/x
  3. Step 3: Cross multiply
    1,180.28x = 1,772.40 × 887.78
  4. Step 4: Simplify right side
    1,180.28x = 1,573,501.27
  5. Step 5: Solve for x
    x = 1,573,501.27/1,180.28
  6. Step 6: Final answer
    x = 1,333.16

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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.