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Finding the Fourth Proportional to 315,936.68, 436,004.34 and 172,706.44

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Solution

The fourth proportional to 315,936.68, 436,004.34 and 172,706.44 is: 238,341.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,936.68 : 436,004.34 = 172,706.44 : x
  2. Step 2: Convert to fraction form
    315,936.68/436,004.34 = 172,706.44/x
  3. Step 3: Cross multiply
    315,936.68x = 436,004.34 × 172,706.44
  4. Step 4: Simplify right side
    315,936.68x = 75,300,757,385.95
  5. Step 5: Solve for x
    x = 75,300,757,385.95/315,936.68
  6. Step 6: Final answer
    x = 238,341.29

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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.