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Finding the Fourth Proportional to 315,397.14, 435,256.29 and 172,170.42

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Solution

The fourth proportional to 315,397.14, 435,256.29 and 172,170.42 is: 237,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,397.14 : 435,256.29 = 172,170.42 : x
  2. Step 2: Convert to fraction form
    315,397.14/435,256.29 = 172,170.42/x
  3. Step 3: Cross multiply
    315,397.14x = 435,256.29 × 172,170.42
  4. Step 4: Simplify right side
    315,397.14x = 74,938,258,256.94
  5. Step 5: Solve for x
    x = 74,938,258,256.94/315,397.14
  6. Step 6: Final answer
    x = 237,599.68

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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.