Home / 288,943.20-399,122.57-221,789.95

Finding the Fourth Proportional to 288,943.20, 399,122.57 and 221,789.95

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Solution

The fourth proportional to 288,943.20, 399,122.57 and 221,789.95 is: 306,362.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,943.20 : 399,122.57 = 221,789.95 : x
  2. Step 2: Convert to fraction form
    288,943.20/399,122.57 = 221,789.95/x
  3. Step 3: Cross multiply
    288,943.20x = 399,122.57 × 221,789.95
  4. Step 4: Simplify right side
    288,943.20x = 88,521,374,400.84
  5. Step 5: Solve for x
    x = 88,521,374,400.84/288,943.20
  6. Step 6: Final answer
    x = 306,362.55

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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.