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Finding the Fourth Proportional to 315,679.73, 435,647.36 and 172,442.12

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Solution

The fourth proportional to 315,679.73, 435,647.36 and 172,442.12 is: 237,975.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,679.73 : 435,647.36 = 172,442.12 : x
  2. Step 2: Convert to fraction form
    315,679.73/435,647.36 = 172,442.12/x
  3. Step 3: Cross multiply
    315,679.73x = 435,647.36 × 172,442.12
  4. Step 4: Simplify right side
    315,679.73x = 75,123,952,583.67
  5. Step 5: Solve for x
    x = 75,123,952,583.67/315,679.73
  6. Step 6: Final answer
    x = 237,975.22

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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.