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Finding the Fourth Proportional to 279,193.84, 385,290.50 and 151,869.76

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Solution

The fourth proportional to 279,193.84, 385,290.50 and 151,869.76 is: 209,581.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,193.84 : 385,290.50 = 151,869.76 : x
  2. Step 2: Convert to fraction form
    279,193.84/385,290.50 = 151,869.76/x
  3. Step 3: Cross multiply
    279,193.84x = 385,290.50 × 151,869.76
  4. Step 4: Simplify right side
    279,193.84x = 58,513,975,765.28
  5. Step 5: Solve for x
    x = 58,513,975,765.28/279,193.84
  6. Step 6: Final answer
    x = 209,581.90

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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.