Home / 2,820.30-4,230.45-2,455.80

Finding the Fourth Proportional to 2,820.30, 4,230.45 and 2,455.80

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Solution

The fourth proportional to 2,820.30, 4,230.45 and 2,455.80 is: 3,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.30 : 4,230.45 = 2,455.80 : x
  2. Step 2: Convert to fraction form
    2,820.30/4,230.45 = 2,455.80/x
  3. Step 3: Cross multiply
    2,820.30x = 4,230.45 × 2,455.80
  4. Step 4: Simplify right side
    2,820.30x = 10,389,139.11
  5. Step 5: Solve for x
    x = 10,389,139.11/2,820.30
  6. Step 6: Final answer
    x = 3,683.70

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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.