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Finding the Fourth Proportional to 1,778.76, 2,666.52 and 911.25

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Solution

The fourth proportional to 1,778.76, 2,666.52 and 911.25 is: 1,366.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.76 : 2,666.52 = 911.25 : x
  2. Step 2: Convert to fraction form
    1,778.76/2,666.52 = 911.25/x
  3. Step 3: Cross multiply
    1,778.76x = 2,666.52 × 911.25
  4. Step 4: Simplify right side
    1,778.76x = 2,429,866.35
  5. Step 5: Solve for x
    x = 2,429,866.35/1,778.76
  6. Step 6: Final answer
    x = 1,366.05

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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.