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Finding the Fourth Proportional to 253,457.40, 349,734.60 and 140,279.88

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Solution

The fourth proportional to 253,457.40, 349,734.60 and 140,279.88 is: 193,565.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,457.40 : 349,734.60 = 140,279.88 : x
  2. Step 2: Convert to fraction form
    253,457.40/349,734.60 = 140,279.88/x
  3. Step 3: Cross multiply
    253,457.40x = 349,734.60 × 140,279.88
  4. Step 4: Simplify right side
    253,457.40x = 49,060,727,719.85
  5. Step 5: Solve for x
    x = 49,060,727,719.85/253,457.40
  6. Step 6: Final answer
    x = 193,565.97

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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.