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Finding the Fourth Proportional to 257,425.72, 385,959.34 and 113,261.72

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Solution

The fourth proportional to 257,425.72, 385,959.34 and 113,261.72 is: 169,813.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,425.72 : 385,959.34 = 113,261.72 : x
  2. Step 2: Convert to fraction form
    257,425.72/385,959.34 = 113,261.72/x
  3. Step 3: Cross multiply
    257,425.72x = 385,959.34 × 113,261.72
  4. Step 4: Simplify right side
    257,425.72x = 43,714,418,698.46
  5. Step 5: Solve for x
    x = 43,714,418,698.46/257,425.72
  6. Step 6: Final answer
    x = 169,813.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.