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Finding the Fourth Proportional to 279,604.28, 385,858.31 and 152,279.78

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Solution

The fourth proportional to 279,604.28, 385,858.31 and 152,279.78 is: 210,148.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,604.28 : 385,858.31 = 152,279.78 : x
  2. Step 2: Convert to fraction form
    279,604.28/385,858.31 = 152,279.78/x
  3. Step 3: Cross multiply
    279,604.28x = 385,858.31 × 152,279.78
  4. Step 4: Simplify right side
    279,604.28x = 58,758,415,867.28
  5. Step 5: Solve for x
    x = 58,758,415,867.28/279,604.28
  6. Step 6: Final answer
    x = 210,148.49

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1.5x scale

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.