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Finding the Fourth Proportional to 311,938.20, 468,069.30 and 145,726.20

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Solution

The fourth proportional to 311,938.20, 468,069.30 and 145,726.20 is: 218,664.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,938.20 : 468,069.30 = 145,726.20 : x
  2. Step 2: Convert to fraction form
    311,938.20/468,069.30 = 145,726.20/x
  3. Step 3: Cross multiply
    311,938.20x = 468,069.30 × 145,726.20
  4. Step 4: Simplify right side
    311,938.20x = 68,209,960,425.66
  5. Step 5: Solve for x
    x = 68,209,960,425.66/311,938.20
  6. Step 6: Final answer
    x = 218,664.98

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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.