Home / 385,109.70-531,475.90-215,343.78

Finding the Fourth Proportional to 385,109.70, 531,475.90 and 215,343.78

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Solution

The fourth proportional to 385,109.70, 531,475.90 and 215,343.78 is: 297,188.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,109.70 : 531,475.90 = 215,343.78 : x
  2. Step 2: Convert to fraction form
    385,109.70/531,475.90 = 215,343.78/x
  3. Step 3: Cross multiply
    385,109.70x = 531,475.90 × 215,343.78
  4. Step 4: Simplify right side
    385,109.70x = 114,450,029,284.90
  5. Step 5: Solve for x
    x = 114,450,029,284.90/385,109.70
  6. Step 6: Final answer
    x = 297,188.12

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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.