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Finding the Fourth Proportional to 698.22, 1,041.66 and 616.21

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Solution

The fourth proportional to 698.22, 1,041.66 and 616.21 is: 919.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.22 : 1,041.66 = 616.21 : x
  2. Step 2: Convert to fraction form
    698.22/1,041.66 = 616.21/x
  3. Step 3: Cross multiply
    698.22x = 1,041.66 × 616.21
  4. Step 4: Simplify right side
    698.22x = 641,878.70
  5. Step 5: Solve for x
    x = 641,878.70/698.22
  6. Step 6: Final answer
    x = 919.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.