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Finding the Fourth Proportional to 315,629, 435,568 and 172,389.38

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Solution

The fourth proportional to 315,629, 435,568 and 172,389.38 is: 237,897.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,629 : 435,568 = 172,389.38 : x
  2. Step 2: Convert to fraction form
    315,629/435,568 = 172,389.38/x
  3. Step 3: Cross multiply
    315,629x = 435,568 × 172,389.38
  4. Step 4: Simplify right side
    315,629x = 75,087,297,467.84
  5. Step 5: Solve for x
    x = 75,087,297,467.84/315,629
  6. Step 6: Final answer
    x = 237,897.33

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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.