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Finding the Fourth Proportional to 698.26, 963.58 and 395.40

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Solution

The fourth proportional to 698.26, 963.58 and 395.40 is: 545.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.26 : 963.58 = 395.40 : x
  2. Step 2: Convert to fraction form
    698.26/963.58 = 395.40/x
  3. Step 3: Cross multiply
    698.26x = 963.58 × 395.40
  4. Step 4: Simplify right side
    698.26x = 380,999.53
  5. Step 5: Solve for x
    x = 380,999.53/698.26
  6. Step 6: Final answer
    x = 545.64

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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.