Home / 1,801.20-2,489.02-1,358.30

Finding the Fourth Proportional to 1,801.20, 2,489.02 and 1,358.30

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Solution

The fourth proportional to 1,801.20, 2,489.02 and 1,358.30 is: 1,876.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.20 : 2,489.02 = 1,358.30 : x
  2. Step 2: Convert to fraction form
    1,801.20/2,489.02 = 1,358.30/x
  3. Step 3: Cross multiply
    1,801.20x = 2,489.02 × 1,358.30
  4. Step 4: Simplify right side
    1,801.20x = 3,380,835.87
  5. Step 5: Solve for x
    x = 3,380,835.87/1,801.20
  6. Step 6: Final answer
    x = 1,876.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.