Home / 426,186.80-639,280.20-267,556.40

Finding the Fourth Proportional to 426,186.80, 639,280.20 and 267,556.40

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Solution

The fourth proportional to 426,186.80, 639,280.20 and 267,556.40 is: 401,334.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,186.80 : 639,280.20 = 267,556.40 : x
  2. Step 2: Convert to fraction form
    426,186.80/639,280.20 = 267,556.40/x
  3. Step 3: Cross multiply
    426,186.80x = 639,280.20 × 267,556.40
  4. Step 4: Simplify right side
    426,186.80x = 171,043,508,903.28
  5. Step 5: Solve for x
    x = 171,043,508,903.28/426,186.80
  6. Step 6: Final answer
    x = 401,334.60

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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.