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Finding the Fourth Proportional to 627,239.11, 865,607.72 and 355,306.94

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Solution

The fourth proportional to 627,239.11, 865,607.72 and 355,306.94 is: 490,333.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,239.11 : 865,607.72 = 355,306.94 : x
  2. Step 2: Convert to fraction form
    627,239.11/865,607.72 = 355,306.94/x
  3. Step 3: Cross multiply
    627,239.11x = 865,607.72 × 355,306.94
  4. Step 4: Simplify right side
    627,239.11x = 307,556,430,233.58
  5. Step 5: Solve for x
    x = 307,556,430,233.58/627,239.11
  6. Step 6: Final answer
    x = 490,333.63

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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.