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Finding the Fourth Proportional to 315,471.54, 435,357.30 and 172,237.62

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Solution

The fourth proportional to 315,471.54, 435,357.30 and 172,237.62 is: 237,691.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,471.54 : 435,357.30 = 172,237.62 : x
  2. Step 2: Convert to fraction form
    315,471.54/435,357.30 = 172,237.62/x
  3. Step 3: Cross multiply
    315,471.54x = 435,357.30 × 172,237.62
  4. Step 4: Simplify right side
    315,471.54x = 74,984,905,201.63
  5. Step 5: Solve for x
    x = 74,984,905,201.63/315,471.54
  6. Step 6: Final answer
    x = 237,691.51

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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.