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Finding the Fourth Proportional to 308,757.70, 426,106.17 and 172,803.46

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Solution

The fourth proportional to 308,757.70, 426,106.17 and 172,803.46 is: 238,480.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,757.70 : 426,106.17 = 172,803.46 : x
  2. Step 2: Convert to fraction form
    308,757.70/426,106.17 = 172,803.46/x
  3. Step 3: Cross multiply
    308,757.70x = 426,106.17 × 172,803.46
  4. Step 4: Simplify right side
    308,757.70x = 73,632,620,503.35
  5. Step 5: Solve for x
    x = 73,632,620,503.35/308,757.70
  6. Step 6: Final answer
    x = 238,480.27

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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.