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Finding the Fourth Proportional to 315,480.84, 435,361.31 and 172,240.88

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Solution

The fourth proportional to 315,480.84, 435,361.31 and 172,240.88 is: 237,691.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,480.84 : 435,361.31 = 172,240.88 : x
  2. Step 2: Convert to fraction form
    315,480.84/435,361.31 = 172,240.88/x
  3. Step 3: Cross multiply
    315,480.84x = 435,361.31 × 172,240.88
  4. Step 4: Simplify right side
    315,480.84x = 74,987,016,671.36
  5. Step 5: Solve for x
    x = 74,987,016,671.36/315,480.84
  6. Step 6: Final answer
    x = 237,691.19

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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.