Home / 256,924.20-385,386.30-90,690.60

Finding the Fourth Proportional to 256,924.20, 385,386.30 and 90,690.60

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Solution

The fourth proportional to 256,924.20, 385,386.30 and 90,690.60 is: 136,035.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,924.20 : 385,386.30 = 90,690.60 : x
  2. Step 2: Convert to fraction form
    256,924.20/385,386.30 = 90,690.60/x
  3. Step 3: Cross multiply
    256,924.20x = 385,386.30 × 90,690.60
  4. Step 4: Simplify right side
    256,924.20x = 34,950,914,778.78
  5. Step 5: Solve for x
    x = 34,950,914,778.78/256,924.20
  6. Step 6: Final answer
    x = 136,035.90

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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.