Home / 661,540.20-992,310.30-212,260.20

Finding the Fourth Proportional to 661,540.20, 992,310.30 and 212,260.20

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Solution

The fourth proportional to 661,540.20, 992,310.30 and 212,260.20 is: 318,390.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,540.20 : 992,310.30 = 212,260.20 : x
  2. Step 2: Convert to fraction form
    661,540.20/992,310.30 = 212,260.20/x
  3. Step 3: Cross multiply
    661,540.20x = 992,310.30 × 212,260.20
  4. Step 4: Simplify right side
    661,540.20x = 210,627,982,740.06
  5. Step 5: Solve for x
    x = 210,627,982,740.06/661,540.20
  6. Step 6: Final answer
    x = 318,390.30

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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.