Home / 385,065.72-531,388.97-215,299.85

Finding the Fourth Proportional to 385,065.72, 531,388.97 and 215,299.85

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Solution

The fourth proportional to 385,065.72, 531,388.97 and 215,299.85 is: 297,112.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,065.72 : 531,388.97 = 215,299.85 : x
  2. Step 2: Convert to fraction form
    385,065.72/531,388.97 = 215,299.85/x
  3. Step 3: Cross multiply
    385,065.72x = 531,388.97 × 215,299.85
  4. Step 4: Simplify right side
    385,065.72x = 114,407,961,799.21
  5. Step 5: Solve for x
    x = 114,407,961,799.21/385,065.72
  6. Step 6: Final answer
    x = 297,112.82

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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.