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Finding the Fourth Proportional to 626,422.84, 864,469.86 and 339,945.40

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Solution

The fourth proportional to 626,422.84, 864,469.86 and 339,945.40 is: 469,128.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,422.84 : 864,469.86 = 339,945.40 : x
  2. Step 2: Convert to fraction form
    626,422.84/864,469.86 = 339,945.40/x
  3. Step 3: Cross multiply
    626,422.84x = 864,469.86 × 339,945.40
  4. Step 4: Simplify right side
    626,422.84x = 293,872,552,345.64
  5. Step 5: Solve for x
    x = 293,872,552,345.64/626,422.84
  6. Step 6: Final answer
    x = 469,128.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.