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Finding the Fourth Proportional to 426,015.40, 638,480.40 and 226,431.40

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Solution

The fourth proportional to 426,015.40, 638,480.40 and 226,431.40 is: 339,358.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,015.40 : 638,480.40 = 226,431.40 : x
  2. Step 2: Convert to fraction form
    426,015.40/638,480.40 = 226,431.40/x
  3. Step 3: Cross multiply
    426,015.40x = 638,480.40 × 226,431.40
  4. Step 4: Simplify right side
    426,015.40x = 144,572,010,844.56
  5. Step 5: Solve for x
    x = 144,572,010,844.56/426,015.40
  6. Step 6: Final answer
    x = 339,358.65

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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.