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Finding the Fourth Proportional to 279,279, 385,375.86 and 158,381.64

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Solution

The fourth proportional to 279,279, 385,375.86 and 158,381.64 is: 218,550.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,279 : 385,375.86 = 158,381.64 : x
  2. Step 2: Convert to fraction form
    279,279/385,375.86 = 158,381.64/x
  3. Step 3: Cross multiply
    279,279x = 385,375.86 × 158,381.64
  4. Step 4: Simplify right side
    279,279x = 61,036,460,723.21
  5. Step 5: Solve for x
    x = 61,036,460,723.21/279,279
  6. Step 6: Final answer
    x = 218,550.13

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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.