Home / 256,867.20-385,300.80-90,633.60

Finding the Fourth Proportional to 256,867.20, 385,300.80 and 90,633.60

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Solution

The fourth proportional to 256,867.20, 385,300.80 and 90,633.60 is: 135,950.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,867.20 : 385,300.80 = 90,633.60 : x
  2. Step 2: Convert to fraction form
    256,867.20/385,300.80 = 90,633.60/x
  3. Step 3: Cross multiply
    256,867.20x = 385,300.80 × 90,633.60
  4. Step 4: Simplify right side
    256,867.20x = 34,921,198,586.88
  5. Step 5: Solve for x
    x = 34,921,198,586.88/256,867.20
  6. Step 6: Final answer
    x = 135,950.40

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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.