Home / 1,631.20-2,261.44-1,543.60

Finding the Fourth Proportional to 1,631.20, 2,261.44 and 1,543.60

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Solution

The fourth proportional to 1,631.20, 2,261.44 and 1,543.60 is: 2,139.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.20 : 2,261.44 = 1,543.60 : x
  2. Step 2: Convert to fraction form
    1,631.20/2,261.44 = 1,543.60/x
  3. Step 3: Cross multiply
    1,631.20x = 2,261.44 × 1,543.60
  4. Step 4: Simplify right side
    1,631.20x = 3,490,758.78
  5. Step 5: Solve for x
    x = 3,490,758.78/1,631.20
  6. Step 6: Final answer
    x = 2,139.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.