Home / 315,531.32-435,431.04-172,291.28

Finding the Fourth Proportional to 315,531.32, 435,431.04 and 172,291.28

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Solution

The fourth proportional to 315,531.32, 435,431.04 and 172,291.28 is: 237,760.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,531.32 : 435,431.04 = 172,291.28 : x
  2. Step 2: Convert to fraction form
    315,531.32/435,431.04 = 172,291.28/x
  3. Step 3: Cross multiply
    315,531.32x = 435,431.04 × 172,291.28
  4. Step 4: Simplify right side
    315,531.32x = 75,020,971,233.33
  5. Step 5: Solve for x
    x = 75,020,971,233.33/315,531.32
  6. Step 6: Final answer
    x = 237,760.78

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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.