Home / 3,641.20-5,461.80-1,909.60

Finding the Fourth Proportional to 3,641.20, 5,461.80 and 1,909.60

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Solution

The fourth proportional to 3,641.20, 5,461.80 and 1,909.60 is: 2,864.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,641.20 : 5,461.80 = 1,909.60 : x
  2. Step 2: Convert to fraction form
    3,641.20/5,461.80 = 1,909.60/x
  3. Step 3: Cross multiply
    3,641.20x = 5,461.80 × 1,909.60
  4. Step 4: Simplify right side
    3,641.20x = 10,429,853.28
  5. Step 5: Solve for x
    x = 10,429,853.28/3,641.20
  6. Step 6: Final answer
    x = 2,864.40

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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.