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Finding the Fourth Proportional to 315,620.88, 435,540.42 and 172,352.94

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Solution

The fourth proportional to 315,620.88, 435,540.42 and 172,352.94 is: 237,838.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,620.88 : 435,540.42 = 172,352.94 : x
  2. Step 2: Convert to fraction form
    315,620.88/435,540.42 = 172,352.94/x
  3. Step 3: Cross multiply
    315,620.88x = 435,540.42 × 172,352.94
  4. Step 4: Simplify right side
    315,620.88x = 75,066,671,875.83
  5. Step 5: Solve for x
    x = 75,066,671,875.83/315,620.88
  6. Step 6: Final answer
    x = 237,838.10

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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.