Home / 386,631.60-579,640.20-211,527.60

Finding the Fourth Proportional to 386,631.60, 579,640.20 and 211,527.60

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Solution

The fourth proportional to 386,631.60, 579,640.20 and 211,527.60 is: 317,123.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,631.60 : 579,640.20 = 211,527.60 : x
  2. Step 2: Convert to fraction form
    386,631.60/579,640.20 = 211,527.60/x
  3. Step 3: Cross multiply
    386,631.60x = 579,640.20 × 211,527.60
  4. Step 4: Simplify right side
    386,631.60x = 122,609,900,369.52
  5. Step 5: Solve for x
    x = 122,609,900,369.52/386,631.60
  6. Step 6: Final answer
    x = 317,123.33

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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.