Home / 627,005.47-865,320.91-355,121.73

Finding the Fourth Proportional to 627,005.47, 865,320.91 and 355,121.73

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Solution

The fourth proportional to 627,005.47, 865,320.91 and 355,121.73 is: 490,098.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,005.47 : 865,320.91 = 355,121.73 : x
  2. Step 2: Convert to fraction form
    627,005.47/865,320.91 = 355,121.73/x
  3. Step 3: Cross multiply
    627,005.47x = 865,320.91 × 355,121.73
  4. Step 4: Simplify right side
    627,005.47x = 307,294,255,242.86
  5. Step 5: Solve for x
    x = 307,294,255,242.86/627,005.47
  6. Step 6: Final answer
    x = 490,098.21

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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.