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Finding the Fourth Proportional to 535.90, 804.10 and 279.40

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Solution

The fourth proportional to 535.90, 804.10 and 279.40 is: 419.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.90 : 804.10 = 279.40 : x
  2. Step 2: Convert to fraction form
    535.90/804.10 = 279.40/x
  3. Step 3: Cross multiply
    535.90x = 804.10 × 279.40
  4. Step 4: Simplify right side
    535.90x = 224,665.54
  5. Step 5: Solve for x
    x = 224,665.54/535.90
  6. Step 6: Final answer
    x = 419.23

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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.