Home / 856,872.10-1,285,049.08-257,674.20

Finding the Fourth Proportional to 856,872.10, 1,285,049.08 and 257,674.20

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Solution

The fourth proportional to 856,872.10, 1,285,049.08 and 257,674.20 is: 386,433.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,872.10 : 1,285,049.08 = 257,674.20 : x
  2. Step 2: Convert to fraction form
    856,872.10/1,285,049.08 = 257,674.20/x
  3. Step 3: Cross multiply
    856,872.10x = 1,285,049.08 × 257,674.20
  4. Step 4: Simplify right side
    856,872.10x = 331,123,993,649.74
  5. Step 5: Solve for x
    x = 331,123,993,649.74/856,872.10
  6. Step 6: Final answer
    x = 386,433.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.