Home / 3,120.18-4,679.76-1,040.20

Finding the Fourth Proportional to 3,120.18, 4,679.76 and 1,040.20

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Solution

The fourth proportional to 3,120.18, 4,679.76 and 1,040.20 is: 1,560.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.18 : 4,679.76 = 1,040.20 : x
  2. Step 2: Convert to fraction form
    3,120.18/4,679.76 = 1,040.20/x
  3. Step 3: Cross multiply
    3,120.18x = 4,679.76 × 1,040.20
  4. Step 4: Simplify right side
    3,120.18x = 4,867,893.50
  5. Step 5: Solve for x
    x = 4,867,893.50/3,120.18
  6. Step 6: Final answer
    x = 1,560.13

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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.