Home / 3,120,719.40-4,681,079.10-1,918,744.20

Finding the Fourth Proportional to 3,120,719.40, 4,681,079.10 and 1,918,744.20

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Solution

The fourth proportional to 3,120,719.40, 4,681,079.10 and 1,918,744.20 is: 2,878,116.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120,719.40 : 4,681,079.10 = 1,918,744.20 : x
  2. Step 2: Convert to fraction form
    3,120,719.40/4,681,079.10 = 1,918,744.20/x
  3. Step 3: Cross multiply
    3,120,719.40x = 4,681,079.10 × 1,918,744.20
  4. Step 4: Simplify right side
    3,120,719.40x = 8,981,793,372,866.22
  5. Step 5: Solve for x
    x = 8,981,793,372,866.22/3,120,719.40
  6. Step 6: Final answer
    x = 2,878,116.30

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Double scale
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Similar ratio
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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.