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Finding the Fourth Proportional to 625,869.90, 863,705.87 and 339,390

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Solution

The fourth proportional to 625,869.90, 863,705.87 and 339,390 is: 468,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,869.90 : 863,705.87 = 339,390 : x
  2. Step 2: Convert to fraction form
    625,869.90/863,705.87 = 339,390/x
  3. Step 3: Cross multiply
    625,869.90x = 863,705.87 × 339,390
  4. Step 4: Simplify right side
    625,869.90x = 293,133,133,522.35
  5. Step 5: Solve for x
    x = 293,133,133,522.35/625,869.90
  6. Step 6: Final answer
    x = 468,361.13

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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.