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Finding the Fourth Proportional to 315,960.80, 436,025.94 and 172,721.48

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Solution

The fourth proportional to 315,960.80, 436,025.94 and 172,721.48 is: 238,355.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,960.80 : 436,025.94 = 172,721.48 : x
  2. Step 2: Convert to fraction form
    315,960.80/436,025.94 = 172,721.48/x
  3. Step 3: Cross multiply
    315,960.80x = 436,025.94 × 172,721.48
  4. Step 4: Simplify right side
    315,960.80x = 75,311,045,675.19
  5. Step 5: Solve for x
    x = 75,311,045,675.19/315,960.80
  6. Step 6: Final answer
    x = 238,355.66

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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.