Home / 414,005.40-621,008.10-129,719.70

Finding the Fourth Proportional to 414,005.40, 621,008.10 and 129,719.70

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Solution

The fourth proportional to 414,005.40, 621,008.10 and 129,719.70 is: 194,579.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,005.40 : 621,008.10 = 129,719.70 : x
  2. Step 2: Convert to fraction form
    414,005.40/621,008.10 = 129,719.70/x
  3. Step 3: Cross multiply
    414,005.40x = 621,008.10 × 129,719.70
  4. Step 4: Simplify right side
    414,005.40x = 80,556,984,429.57
  5. Step 5: Solve for x
    x = 80,556,984,429.57/414,005.40
  6. Step 6: Final answer
    x = 194,579.55

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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.