Home / 3,909.60-5,864.40-2,431.20

Finding the Fourth Proportional to 3,909.60, 5,864.40 and 2,431.20

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Solution

The fourth proportional to 3,909.60, 5,864.40 and 2,431.20 is: 3,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.60 : 5,864.40 = 2,431.20 : x
  2. Step 2: Convert to fraction form
    3,909.60/5,864.40 = 2,431.20/x
  3. Step 3: Cross multiply
    3,909.60x = 5,864.40 × 2,431.20
  4. Step 4: Simplify right side
    3,909.60x = 14,257,529.28
  5. Step 5: Solve for x
    x = 14,257,529.28/3,909.60
  6. Step 6: Final answer
    x = 3,646.80

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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.