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Finding the Fourth Proportional to 986.04, 1,360.70 and 571.96

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Solution

The fourth proportional to 986.04, 1,360.70 and 571.96 is: 789.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.04 : 1,360.70 = 571.96 : x
  2. Step 2: Convert to fraction form
    986.04/1,360.70 = 571.96/x
  3. Step 3: Cross multiply
    986.04x = 1,360.70 × 571.96
  4. Step 4: Simplify right side
    986.04x = 778,265.97
  5. Step 5: Solve for x
    x = 778,265.97/986.04
  6. Step 6: Final answer
    x = 789.28

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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.