Home / 385,108.75-531,409.19-212,999.37

Finding the Fourth Proportional to 385,108.75, 531,409.19 and 212,999.37

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Solution

The fourth proportional to 385,108.75, 531,409.19 and 212,999.37 is: 293,916.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,108.75 : 531,409.19 = 212,999.37 : x
  2. Step 2: Convert to fraction form
    385,108.75/531,409.19 = 212,999.37/x
  3. Step 3: Cross multiply
    385,108.75x = 531,409.19 × 212,999.37
  4. Step 4: Simplify right side
    385,108.75x = 113,189,820,025.16
  5. Step 5: Solve for x
    x = 113,189,820,025.16/385,108.75
  6. Step 6: Final answer
    x = 293,916.51

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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.