Home / 259,426.80-388,679.40-212,425.20

Finding the Fourth Proportional to 259,426.80, 388,679.40 and 212,425.20

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Solution

The fourth proportional to 259,426.80, 388,679.40 and 212,425.20 is: 318,260.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,426.80 : 388,679.40 = 212,425.20 : x
  2. Step 2: Convert to fraction form
    259,426.80/388,679.40 = 212,425.20/x
  3. Step 3: Cross multiply
    259,426.80x = 388,679.40 × 212,425.20
  4. Step 4: Simplify right side
    259,426.80x = 82,565,299,280.88
  5. Step 5: Solve for x
    x = 82,565,299,280.88/259,426.80
  6. Step 6: Final answer
    x = 318,260.49

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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.