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Finding the Fourth Proportional to 886.75, 1,330.80 and 784.24

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Solution

The fourth proportional to 886.75, 1,330.80 and 784.24 is: 1,176.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.75 : 1,330.80 = 784.24 : x
  2. Step 2: Convert to fraction form
    886.75/1,330.80 = 784.24/x
  3. Step 3: Cross multiply
    886.75x = 1,330.80 × 784.24
  4. Step 4: Simplify right side
    886.75x = 1,043,666.59
  5. Step 5: Solve for x
    x = 1,043,666.59/886.75
  6. Step 6: Final answer
    x = 1,176.96

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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.