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Finding the Fourth Proportional to 1,666.33, 2,498.55 and 775.90

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Solution

The fourth proportional to 1,666.33, 2,498.55 and 775.90 is: 1,163.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.33 : 2,498.55 = 775.90 : x
  2. Step 2: Convert to fraction form
    1,666.33/2,498.55 = 775.90/x
  3. Step 3: Cross multiply
    1,666.33x = 2,498.55 × 775.90
  4. Step 4: Simplify right side
    1,666.33x = 1,938,624.95
  5. Step 5: Solve for x
    x = 1,938,624.95/1,666.33
  6. Step 6: Final answer
    x = 1,163.41

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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.