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Finding the Fourth Proportional to 315,462.54, 435,344.88 and 172,228.62

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Solution

The fourth proportional to 315,462.54, 435,344.88 and 172,228.62 is: 237,679.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,462.54 : 435,344.88 = 172,228.62 : x
  2. Step 2: Convert to fraction form
    315,462.54/435,344.88 = 172,228.62/x
  3. Step 3: Cross multiply
    315,462.54x = 435,344.88 × 172,228.62
  4. Step 4: Simplify right side
    315,462.54x = 74,978,847,906.47
  5. Step 5: Solve for x
    x = 74,978,847,906.47/315,462.54
  6. Step 6: Final answer
    x = 237,679.09

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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.