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Finding the Fourth Proportional to 279,496.64, 385,704.78 and 152,171.12

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Solution

The fourth proportional to 279,496.64, 385,704.78 and 152,171.12 is: 209,995.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,496.64 : 385,704.78 = 152,171.12 : x
  2. Step 2: Convert to fraction form
    279,496.64/385,704.78 = 152,171.12/x
  3. Step 3: Cross multiply
    279,496.64x = 385,704.78 × 152,171.12
  4. Step 4: Simplify right side
    279,496.64x = 58,693,128,361.95
  5. Step 5: Solve for x
    x = 58,693,128,361.95/279,496.64
  6. Step 6: Final answer
    x = 209,995.83

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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.