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Finding the Fourth Proportional to 391,861.52, 540,674.28 and 248,569.52

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Solution

The fourth proportional to 391,861.52, 540,674.28 and 248,569.52 is: 342,965.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,861.52 : 540,674.28 = 248,569.52 : x
  2. Step 2: Convert to fraction form
    391,861.52/540,674.28 = 248,569.52/x
  3. Step 3: Cross multiply
    391,861.52x = 540,674.28 × 248,569.52
  4. Step 4: Simplify right side
    391,861.52x = 134,395,146,255.95
  5. Step 5: Solve for x
    x = 134,395,146,255.95/391,861.52
  6. Step 6: Final answer
    x = 342,965.92

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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.