Home / 858,143.70-1,287,215.55-218,446.20

Finding the Fourth Proportional to 858,143.70, 1,287,215.55 and 218,446.20

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Solution

The fourth proportional to 858,143.70, 1,287,215.55 and 218,446.20 is: 327,669.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,143.70 : 1,287,215.55 = 218,446.20 : x
  2. Step 2: Convert to fraction form
    858,143.70/1,287,215.55 = 218,446.20/x
  3. Step 3: Cross multiply
    858,143.70x = 1,287,215.55 × 218,446.20
  4. Step 4: Simplify right side
    858,143.70x = 281,187,345,478.41
  5. Step 5: Solve for x
    x = 281,187,345,478.41/858,143.70
  6. Step 6: Final answer
    x = 327,669.30

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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.