Home / 857,984.70-1,286,977.05-218,287.20

Finding the Fourth Proportional to 857,984.70, 1,286,977.05 and 218,287.20

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Solution

The fourth proportional to 857,984.70, 1,286,977.05 and 218,287.20 is: 327,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,984.70 : 1,286,977.05 = 218,287.20 : x
  2. Step 2: Convert to fraction form
    857,984.70/1,286,977.05 = 218,287.20/x
  3. Step 3: Cross multiply
    857,984.70x = 1,286,977.05 × 218,287.20
  4. Step 4: Simplify right side
    857,984.70x = 280,930,616,708.76
  5. Step 5: Solve for x
    x = 280,930,616,708.76/857,984.70
  6. Step 6: Final answer
    x = 327,430.80

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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.