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Finding the Fourth Proportional to 315,965.32, 436,032.36 and 172,725.40

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Solution

The fourth proportional to 315,965.32, 436,032.36 and 172,725.40 is: 238,361.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,965.32 : 436,032.36 = 172,725.40 : x
  2. Step 2: Convert to fraction form
    315,965.32/436,032.36 = 172,725.40/x
  3. Step 3: Cross multiply
    315,965.32x = 436,032.36 × 172,725.40
  4. Step 4: Simplify right side
    315,965.32x = 75,313,863,793.94
  5. Step 5: Solve for x
    x = 75,313,863,793.94/315,965.32
  6. Step 6: Final answer
    x = 238,361.17

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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.