Home / 856,407.50-1,284,561.84-257,355.80

Finding the Fourth Proportional to 856,407.50, 1,284,561.84 and 257,355.80

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Solution

The fourth proportional to 856,407.50, 1,284,561.84 and 257,355.80 is: 386,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,407.50 : 1,284,561.84 = 257,355.80 : x
  2. Step 2: Convert to fraction form
    856,407.50/1,284,561.84 = 257,355.80/x
  3. Step 3: Cross multiply
    856,407.50x = 1,284,561.84 × 257,355.80
  4. Step 4: Simplify right side
    856,407.50x = 330,589,439,982.67
  5. Step 5: Solve for x
    x = 330,589,439,982.67/856,407.50
  6. Step 6: Final answer
    x = 386,018.85

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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.