Home / 4,987.85-7,481.75-1,289.76

Finding the Fourth Proportional to 4,987.85, 7,481.75 and 1,289.76

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Solution

The fourth proportional to 4,987.85, 7,481.75 and 1,289.76 is: 1,934.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.85 : 7,481.75 = 1,289.76 : x
  2. Step 2: Convert to fraction form
    4,987.85/7,481.75 = 1,289.76/x
  3. Step 3: Cross multiply
    4,987.85x = 7,481.75 × 1,289.76
  4. Step 4: Simplify right side
    4,987.85x = 9,649,655.43
  5. Step 5: Solve for x
    x = 9,649,655.43/4,987.85
  6. Step 6: Final answer
    x = 1,934.63

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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.