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Finding the Fourth Proportional to 426,180.80, 639,271.20 and 267,550.40

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Solution

The fourth proportional to 426,180.80, 639,271.20 and 267,550.40 is: 401,325.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,180.80 : 639,271.20 = 267,550.40 : x
  2. Step 2: Convert to fraction form
    426,180.80/639,271.20 = 267,550.40/x
  3. Step 3: Cross multiply
    426,180.80x = 639,271.20 × 267,550.40
  4. Step 4: Simplify right side
    426,180.80x = 171,037,265,268.48
  5. Step 5: Solve for x
    x = 171,037,265,268.48/426,180.80
  6. Step 6: Final answer
    x = 401,325.60

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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.