Home / 315,815.12-435,835.62-172,584.39

Finding the Fourth Proportional to 315,815.12, 435,835.62 and 172,584.39

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Solution

The fourth proportional to 315,815.12, 435,835.62 and 172,584.39 is: 238,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,815.12 : 435,835.62 = 172,584.39 : x
  2. Step 2: Convert to fraction form
    315,815.12/435,835.62 = 172,584.39/x
  3. Step 3: Cross multiply
    315,815.12x = 435,835.62 × 172,584.39
  4. Step 4: Simplify right side
    315,815.12x = 75,218,424,617.97
  5. Step 5: Solve for x
    x = 75,218,424,617.97/315,815.12
  6. Step 6: Final answer
    x = 238,172.34

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1.5x scale

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.