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Finding the Fourth Proportional to 316,989.71, 437,490.59 and 196,169.90

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Solution

The fourth proportional to 316,989.71, 437,490.59 and 196,169.90 is: 270,742.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,989.71 : 437,490.59 = 196,169.90 : x
  2. Step 2: Convert to fraction form
    316,989.71/437,490.59 = 196,169.90/x
  3. Step 3: Cross multiply
    316,989.71x = 437,490.59 × 196,169.90
  4. Step 4: Simplify right side
    316,989.71x = 85,822,485,291.24
  5. Step 5: Solve for x
    x = 85,822,485,291.24/316,989.71
  6. Step 6: Final answer
    x = 270,742.18

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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.