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Finding the Fourth Proportional to 279,195.68, 418,795.72 and 79,515.76

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Solution

The fourth proportional to 279,195.68, 418,795.72 and 79,515.76 is: 119,274.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,195.68 : 418,795.72 = 79,515.76 : x
  2. Step 2: Convert to fraction form
    279,195.68/418,795.72 = 79,515.76/x
  3. Step 3: Cross multiply
    279,195.68x = 418,795.72 × 79,515.76
  4. Step 4: Simplify right side
    279,195.68x = 33,300,859,960.55
  5. Step 5: Solve for x
    x = 33,300,859,960.55/279,195.68
  6. Step 6: Final answer
    x = 119,274.27

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1.5x scale

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.