Home / 858,143.20-1,287,214.80-218,445.70

Finding the Fourth Proportional to 858,143.20, 1,287,214.80 and 218,445.70

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Solution

The fourth proportional to 858,143.20, 1,287,214.80 and 218,445.70 is: 327,668.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,143.20 : 1,287,214.80 = 218,445.70 : x
  2. Step 2: Convert to fraction form
    858,143.20/1,287,214.80 = 218,445.70/x
  3. Step 3: Cross multiply
    858,143.20x = 1,287,214.80 × 218,445.70
  4. Step 4: Simplify right side
    858,143.20x = 281,186,538,036.36
  5. Step 5: Solve for x
    x = 281,186,538,036.36/858,143.20
  6. Step 6: Final answer
    x = 327,668.55

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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.