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Finding the Fourth Proportional to 4,987.85, 7,481.33 and 1,866.38

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Solution

The fourth proportional to 4,987.85, 7,481.33 and 1,866.38 is: 2,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.85 : 7,481.33 = 1,866.38 : x
  2. Step 2: Convert to fraction form
    4,987.85/7,481.33 = 1,866.38/x
  3. Step 3: Cross multiply
    4,987.85x = 7,481.33 × 1,866.38
  4. Step 4: Simplify right side
    4,987.85x = 13,962,964.95
  5. Step 5: Solve for x
    x = 13,962,964.95/4,987.85
  6. Step 6: Final answer
    x = 2,799.40

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1.5x scale

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.