Home / 315,901.68-435,956.04-172,671.36

Finding the Fourth Proportional to 315,901.68, 435,956.04 and 172,671.36

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Solution

The fourth proportional to 315,901.68, 435,956.04 and 172,671.36 is: 238,292.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,901.68 : 435,956.04 = 172,671.36 : x
  2. Step 2: Convert to fraction form
    315,901.68/435,956.04 = 172,671.36/x
  3. Step 3: Cross multiply
    315,901.68x = 435,956.04 × 172,671.36
  4. Step 4: Simplify right side
    315,901.68x = 75,277,122,327.01
  5. Step 5: Solve for x
    x = 75,277,122,327.01/315,901.68
  6. Step 6: Final answer
    x = 238,292.88

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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.