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Finding the Fourth Proportional to 316,861.20, 436,976.16 and 215,034.48

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Solution

The fourth proportional to 316,861.20, 436,976.16 and 215,034.48 is: 296,549.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,861.20 : 436,976.16 = 215,034.48 : x
  2. Step 2: Convert to fraction form
    316,861.20/436,976.16 = 215,034.48/x
  3. Step 3: Cross multiply
    316,861.20x = 436,976.16 × 215,034.48
  4. Step 4: Simplify right side
    316,861.20x = 93,964,941,338.00
  5. Step 5: Solve for x
    x = 93,964,941,338.00/316,861.20
  6. Step 6: Final answer
    x = 296,549.22

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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.