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Finding the Fourth Proportional to 316,639.43, 436,959.13 and 171,442.71

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Solution

The fourth proportional to 316,639.43, 436,959.13 and 171,442.71 is: 236,589.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,639.43 : 436,959.13 = 171,442.71 : x
  2. Step 2: Convert to fraction form
    316,639.43/436,959.13 = 171,442.71/x
  3. Step 3: Cross multiply
    316,639.43x = 436,959.13 × 171,442.71
  4. Step 4: Simplify right side
    316,639.43x = 74,913,456,977.84
  5. Step 5: Solve for x
    x = 74,913,456,977.84/316,639.43
  6. Step 6: Final answer
    x = 236,589.16

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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.