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Finding the Fourth Proportional to 315,871.04, 435,902.07 and 172,631.04

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Solution

The fourth proportional to 315,871.04, 435,902.07 and 172,631.04 is: 238,230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,871.04 : 435,902.07 = 172,631.04 : x
  2. Step 2: Convert to fraction form
    315,871.04/435,902.07 = 172,631.04/x
  3. Step 3: Cross multiply
    315,871.04x = 435,902.07 × 172,631.04
  4. Step 4: Simplify right side
    315,871.04x = 75,250,227,682.25
  5. Step 5: Solve for x
    x = 75,250,227,682.25/315,871.04
  6. Step 6: Final answer
    x = 238,230.86

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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.