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Finding the Fourth Proportional to 299,981.88, 449,155.80 and 211,102.20

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Solution

The fourth proportional to 299,981.88, 449,155.80 and 211,102.20 is: 316,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,981.88 : 449,155.80 = 211,102.20 : x
  2. Step 2: Convert to fraction form
    299,981.88/449,155.80 = 211,102.20/x
  3. Step 3: Cross multiply
    299,981.88x = 449,155.80 × 211,102.20
  4. Step 4: Simplify right side
    299,981.88x = 94,817,777,522.76
  5. Step 5: Solve for x
    x = 94,817,777,522.76/299,981.88
  6. Step 6: Final answer
    x = 316,078.35

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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.