Home / 664,619.40-996,929.10-221,387.40

Finding the Fourth Proportional to 664,619.40, 996,929.10 and 221,387.40

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Solution

The fourth proportional to 664,619.40, 996,929.10 and 221,387.40 is: 332,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,619.40 : 996,929.10 = 221,387.40 : x
  2. Step 2: Convert to fraction form
    664,619.40/996,929.10 = 221,387.40/x
  3. Step 3: Cross multiply
    664,619.40x = 996,929.10 × 221,387.40
  4. Step 4: Simplify right side
    664,619.40x = 220,707,541,433.34
  5. Step 5: Solve for x
    x = 220,707,541,433.34/664,619.40
  6. Step 6: Final answer
    x = 332,081.10

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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.