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Finding the Fourth Proportional to 279,392.85, 385,570.44 and 172,024.79

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Solution

The fourth proportional to 279,392.85, 385,570.44 and 172,024.79 is: 237,399.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,392.85 : 385,570.44 = 172,024.79 : x
  2. Step 2: Convert to fraction form
    279,392.85/385,570.44 = 172,024.79/x
  3. Step 3: Cross multiply
    279,392.85x = 385,570.44 × 172,024.79
  4. Step 4: Simplify right side
    279,392.85x = 66,327,672,043.36
  5. Step 5: Solve for x
    x = 66,327,672,043.36/279,392.85
  6. Step 6: Final answer
    x = 237,399.32

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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.