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Finding the Fourth Proportional to 279,540.64, 385,767.88 and 152,216.72

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Solution

The fourth proportional to 279,540.64, 385,767.88 and 152,216.72 is: 210,060.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,540.64 : 385,767.88 = 152,216.72 : x
  2. Step 2: Convert to fraction form
    279,540.64/385,767.88 = 152,216.72/x
  3. Step 3: Cross multiply
    279,540.64x = 385,767.88 × 152,216.72
  4. Step 4: Simplify right side
    279,540.64x = 58,720,321,374.95
  5. Step 5: Solve for x
    x = 58,720,321,374.95/279,540.64
  6. Step 6: Final answer
    x = 210,060.05

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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.