Home / 858,123.20-1,287,184.80-218,425.70

Finding the Fourth Proportional to 858,123.20, 1,287,184.80 and 218,425.70

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Solution

The fourth proportional to 858,123.20, 1,287,184.80 and 218,425.70 is: 327,638.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,123.20 : 1,287,184.80 = 218,425.70 : x
  2. Step 2: Convert to fraction form
    858,123.20/1,287,184.80 = 218,425.70/x
  3. Step 3: Cross multiply
    858,123.20x = 1,287,184.80 × 218,425.70
  4. Step 4: Simplify right side
    858,123.20x = 281,154,240,969.36
  5. Step 5: Solve for x
    x = 281,154,240,969.36/858,123.20
  6. Step 6: Final answer
    x = 327,638.55

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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.