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Finding the Fourth Proportional to 253,062.72, 349,215.75 and 138,339.24

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Solution

The fourth proportional to 253,062.72, 349,215.75 and 138,339.24 is: 190,902.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,062.72 : 349,215.75 = 138,339.24 : x
  2. Step 2: Convert to fraction form
    253,062.72/349,215.75 = 138,339.24/x
  3. Step 3: Cross multiply
    253,062.72x = 349,215.75 × 138,339.24
  4. Step 4: Simplify right side
    253,062.72x = 48,310,241,451.03
  5. Step 5: Solve for x
    x = 48,310,241,451.03/253,062.72
  6. Step 6: Final answer
    x = 190,902.25

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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.