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Finding the Fourth Proportional to 312,663.80, 431,476.44 and 169,423.84

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Solution

The fourth proportional to 312,663.80, 431,476.44 and 169,423.84 is: 233,805.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,663.80 : 431,476.44 = 169,423.84 : x
  2. Step 2: Convert to fraction form
    312,663.80/431,476.44 = 169,423.84/x
  3. Step 3: Cross multiply
    312,663.80x = 431,476.44 × 169,423.84
  4. Step 4: Simplify right side
    312,663.80x = 73,102,395,334.33
  5. Step 5: Solve for x
    x = 73,102,395,334.33/312,663.80
  6. Step 6: Final answer
    x = 233,805.11

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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.