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Finding the Fourth Proportional to 613,640.61, 920,513.43 and 187,272.36

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Solution

The fourth proportional to 613,640.61, 920,513.43 and 187,272.36 is: 280,924.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,640.61 : 920,513.43 = 187,272.36 : x
  2. Step 2: Convert to fraction form
    613,640.61/920,513.43 = 187,272.36/x
  3. Step 3: Cross multiply
    613,640.61x = 920,513.43 × 187,272.36
  4. Step 4: Simplify right side
    613,640.61x = 172,386,722,447.80
  5. Step 5: Solve for x
    x = 172,386,722,447.80/613,640.61
  6. Step 6: Final answer
    x = 280,924.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.