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Finding the Fourth Proportional to 279,181.80, 385,339.32 and 158,393.79

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Solution

The fourth proportional to 279,181.80, 385,339.32 and 158,393.79 is: 218,622.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,181.80 : 385,339.32 = 158,393.79 : x
  2. Step 2: Convert to fraction form
    279,181.80/385,339.32 = 158,393.79/x
  3. Step 3: Cross multiply
    279,181.80x = 385,339.32 × 158,393.79
  4. Step 4: Simplify right side
    279,181.80x = 61,035,355,330.82
  5. Step 5: Solve for x
    x = 61,035,355,330.82/279,181.80
  6. Step 6: Final answer
    x = 218,622.26

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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.