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Finding the Fourth Proportional to 312,554.45, 431,327.21 and 169,314.39

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Solution

The fourth proportional to 312,554.45, 431,327.21 and 169,314.39 is: 233,654.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,554.45 : 431,327.21 = 169,314.39 : x
  2. Step 2: Convert to fraction form
    312,554.45/431,327.21 = 169,314.39/x
  3. Step 3: Cross multiply
    312,554.45x = 431,327.21 × 169,314.39
  4. Step 4: Simplify right side
    312,554.45x = 73,029,902,604.98
  5. Step 5: Solve for x
    x = 73,029,902,604.98/312,554.45
  6. Step 6: Final answer
    x = 233,654.98

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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.