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Finding the Fourth Proportional to 279,392.64, 385,570.20 and 172,024.62

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Solution

The fourth proportional to 279,392.64, 385,570.20 and 172,024.62 is: 237,399.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,392.64 : 385,570.20 = 172,024.62 : x
  2. Step 2: Convert to fraction form
    279,392.64/385,570.20 = 172,024.62/x
  3. Step 3: Cross multiply
    279,392.64x = 385,570.20 × 172,024.62
  4. Step 4: Simplify right side
    279,392.64x = 66,327,567,138.32
  5. Step 5: Solve for x
    x = 66,327,567,138.32/279,392.64
  6. Step 6: Final answer
    x = 237,399.12

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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.