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Finding the Fourth Proportional to 626,381.49, 864,408.78 and 339,901.50

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Solution

The fourth proportional to 626,381.49, 864,408.78 and 339,901.50 is: 469,065.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,381.49 : 864,408.78 = 339,901.50 : x
  2. Step 2: Convert to fraction form
    626,381.49/864,408.78 = 339,901.50/x
  3. Step 3: Cross multiply
    626,381.49x = 864,408.78 × 339,901.50
  4. Step 4: Simplify right side
    626,381.49x = 293,813,840,935.17
  5. Step 5: Solve for x
    x = 293,813,840,935.17/626,381.49
  6. Step 6: Final answer
    x = 469,065.33

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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.