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Finding the Fourth Proportional to 279,860.55, 418,897.80 and 220,811.55

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Solution

The fourth proportional to 279,860.55, 418,897.80 and 220,811.55 is: 330,512.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,860.55 : 418,897.80 = 220,811.55 : x
  2. Step 2: Convert to fraction form
    279,860.55/418,897.80 = 220,811.55/x
  3. Step 3: Cross multiply
    279,860.55x = 418,897.80 × 220,811.55
  4. Step 4: Simplify right side
    279,860.55x = 92,497,472,509.59
  5. Step 5: Solve for x
    x = 92,497,472,509.59/279,860.55
  6. Step 6: Final answer
    x = 330,512.72

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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.