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Finding the Fourth Proportional to 627,437.30, 865,861.16 and 355,556.97

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Solution

The fourth proportional to 627,437.30, 865,861.16 and 355,556.97 is: 490,667.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,437.30 : 865,861.16 = 355,556.97 : x
  2. Step 2: Convert to fraction form
    627,437.30/865,861.16 = 355,556.97/x
  3. Step 3: Cross multiply
    627,437.30x = 865,861.16 × 355,556.97
  4. Step 4: Simplify right side
    627,437.30x = 307,862,968,712.50
  5. Step 5: Solve for x
    x = 307,862,968,712.50/627,437.30
  6. Step 6: Final answer
    x = 490,667.31

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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.