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Finding the Fourth Proportional to 535.50, 802.43 and 397.90

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Solution

The fourth proportional to 535.50, 802.43 and 397.90 is: 596.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.50 : 802.43 = 397.90 : x
  2. Step 2: Convert to fraction form
    535.50/802.43 = 397.90/x
  3. Step 3: Cross multiply
    535.50x = 802.43 × 397.90
  4. Step 4: Simplify right side
    535.50x = 319,286.90
  5. Step 5: Solve for x
    x = 319,286.90/535.50
  6. Step 6: Final answer
    x = 596.24

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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.