Home / 627,005.63-865,321.14-355,121.90

Finding the Fourth Proportional to 627,005.63, 865,321.14 and 355,121.90

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Solution

The fourth proportional to 627,005.63, 865,321.14 and 355,121.90 is: 490,098.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,005.63 : 865,321.14 = 355,121.90 : x
  2. Step 2: Convert to fraction form
    627,005.63/865,321.14 = 355,121.90/x
  3. Step 3: Cross multiply
    627,005.63x = 865,321.14 × 355,121.90
  4. Step 4: Simplify right side
    627,005.63x = 307,294,483,020.36
  5. Step 5: Solve for x
    x = 307,294,483,020.36/627,005.63
  6. Step 6: Final answer
    x = 490,098.45

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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.