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Finding the Fourth Proportional to 315,792.78, 435,788.88 and 172,549.80

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Solution

The fourth proportional to 315,792.78, 435,788.88 and 172,549.80 is: 238,115.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,792.78 : 435,788.88 = 172,549.80 : x
  2. Step 2: Convert to fraction form
    315,792.78/435,788.88 = 172,549.80/x
  3. Step 3: Cross multiply
    315,792.78x = 435,788.88 × 172,549.80
  4. Step 4: Simplify right side
    315,792.78x = 75,195,284,086.22
  5. Step 5: Solve for x
    x = 75,195,284,086.22/315,792.78
  6. Step 6: Final answer
    x = 238,115.91

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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.