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Finding the Fourth Proportional to 727.89, 999.03 and 647.39

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Solution

The fourth proportional to 727.89, 999.03 and 647.39 is: 888.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.89 : 999.03 = 647.39 : x
  2. Step 2: Convert to fraction form
    727.89/999.03 = 647.39/x
  3. Step 3: Cross multiply
    727.89x = 999.03 × 647.39
  4. Step 4: Simplify right side
    727.89x = 646,766.96
  5. Step 5: Solve for x
    x = 646,766.96/727.89
  6. Step 6: Final answer
    x = 888.55

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.