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Finding the Fourth Proportional to 1,779, 2,666.75 and 854.30

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Solution

The fourth proportional to 1,779, 2,666.75 and 854.30 is: 1,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779 : 2,666.75 = 854.30 : x
  2. Step 2: Convert to fraction form
    1,779/2,666.75 = 854.30/x
  3. Step 3: Cross multiply
    1,779x = 2,666.75 × 854.30
  4. Step 4: Simplify right side
    1,779x = 2,278,186.92
  5. Step 5: Solve for x
    x = 2,278,186.92/1,779
  6. Step 6: Final answer
    x = 1,280.60

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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.