Home / 385,344.12-531,785.34-215,576.76

Finding the Fourth Proportional to 385,344.12, 531,785.34 and 215,576.76

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Solution

The fourth proportional to 385,344.12, 531,785.34 and 215,576.76 is: 297,501.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,344.12 : 531,785.34 = 215,576.76 : x
  2. Step 2: Convert to fraction form
    385,344.12/531,785.34 = 215,576.76/x
  3. Step 3: Cross multiply
    385,344.12x = 531,785.34 × 215,576.76
  4. Step 4: Simplify right side
    385,344.12x = 114,640,560,612.70
  5. Step 5: Solve for x
    x = 114,640,560,612.70/385,344.12
  6. Step 6: Final answer
    x = 297,501.78

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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.