Home / 389,932.62-585,084.90-212,435.70

Finding the Fourth Proportional to 389,932.62, 585,084.90 and 212,435.70

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Solution

The fourth proportional to 389,932.62, 585,084.90 and 212,435.70 is: 318,754.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,932.62 : 585,084.90 = 212,435.70 : x
  2. Step 2: Convert to fraction form
    389,932.62/585,084.90 = 212,435.70/x
  3. Step 3: Cross multiply
    389,932.62x = 585,084.90 × 212,435.70
  4. Step 4: Simplify right side
    389,932.62x = 124,292,920,290.93
  5. Step 5: Solve for x
    x = 124,292,920,290.93/389,932.62
  6. Step 6: Final answer
    x = 318,754.87

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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.