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Finding the Fourth Proportional to 1,777.20, 2,666.38 and 544.85

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Solution

The fourth proportional to 1,777.20, 2,666.38 and 544.85 is: 817.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.20 : 2,666.38 = 544.85 : x
  2. Step 2: Convert to fraction form
    1,777.20/2,666.38 = 544.85/x
  3. Step 3: Cross multiply
    1,777.20x = 2,666.38 × 544.85
  4. Step 4: Simplify right side
    1,777.20x = 1,452,777.14
  5. Step 5: Solve for x
    x = 1,452,777.14/1,777.20
  6. Step 6: Final answer
    x = 817.45

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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.