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Finding the Fourth Proportional to 426,008.40, 638,469.90 and 226,424.40

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Solution

The fourth proportional to 426,008.40, 638,469.90 and 226,424.40 is: 339,348.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,008.40 : 638,469.90 = 226,424.40 : x
  2. Step 2: Convert to fraction form
    426,008.40/638,469.90 = 226,424.40/x
  3. Step 3: Cross multiply
    426,008.40x = 638,469.90 × 226,424.40
  4. Step 4: Simplify right side
    426,008.40x = 144,565,164,025.56
  5. Step 5: Solve for x
    x = 144,565,164,025.56/426,008.40
  6. Step 6: Final answer
    x = 339,348.15

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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.