Home / 278,640.12-384,839.52-187,840.08

Finding the Fourth Proportional to 278,640.12, 384,839.52 and 187,840.08

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Solution

The fourth proportional to 278,640.12, 384,839.52 and 187,840.08 is: 259,432.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,640.12 : 384,839.52 = 187,840.08 : x
  2. Step 2: Convert to fraction form
    278,640.12/384,839.52 = 187,840.08/x
  3. Step 3: Cross multiply
    278,640.12x = 384,839.52 × 187,840.08
  4. Step 4: Simplify right side
    278,640.12x = 72,288,286,223.96
  5. Step 5: Solve for x
    x = 72,288,286,223.96/278,640.12
  6. Step 6: Final answer
    x = 259,432.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.