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Finding the Fourth Proportional to 315,652.20, 435,610.50 and 172,425.60

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Solution

The fourth proportional to 315,652.20, 435,610.50 and 172,425.60 is: 237,953.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,652.20 : 435,610.50 = 172,425.60 : x
  2. Step 2: Convert to fraction form
    315,652.20/435,610.50 = 172,425.60/x
  3. Step 3: Cross multiply
    315,652.20x = 435,610.50 × 172,425.60
  4. Step 4: Simplify right side
    315,652.20x = 75,110,401,828.80
  5. Step 5: Solve for x
    x = 75,110,401,828.80/315,652.20
  6. Step 6: Final answer
    x = 237,953.04

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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.