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Finding the Fourth Proportional to 426,007.90, 638,469.15 and 226,423.90

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Solution

The fourth proportional to 426,007.90, 638,469.15 and 226,423.90 is: 339,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,007.90 : 638,469.15 = 226,423.90 : x
  2. Step 2: Convert to fraction form
    426,007.90/638,469.15 = 226,423.90/x
  3. Step 3: Cross multiply
    426,007.90x = 638,469.15 × 226,423.90
  4. Step 4: Simplify right side
    426,007.90x = 144,564,674,972.69
  5. Step 5: Solve for x
    x = 144,564,674,972.69/426,007.90
  6. Step 6: Final answer
    x = 339,347.40

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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.