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Finding the Fourth Proportional to 279,438.76, 385,625.50 and 152,115.28

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Solution

The fourth proportional to 279,438.76, 385,625.50 and 152,115.28 is: 209,919.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,438.76 : 385,625.50 = 152,115.28 : x
  2. Step 2: Convert to fraction form
    279,438.76/385,625.50 = 152,115.28/x
  3. Step 3: Cross multiply
    279,438.76x = 385,625.50 × 152,115.28
  4. Step 4: Simplify right side
    279,438.76x = 58,659,530,907.64
  5. Step 5: Solve for x
    x = 58,659,530,907.64/279,438.76
  6. Step 6: Final answer
    x = 209,919.09

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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.