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Finding the Fourth Proportional to 535.28, 802.88 and 260.96

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Solution

The fourth proportional to 535.28, 802.88 and 260.96 is: 391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.28 : 802.88 = 260.96 : x
  2. Step 2: Convert to fraction form
    535.28/802.88 = 260.96/x
  3. Step 3: Cross multiply
    535.28x = 802.88 × 260.96
  4. Step 4: Simplify right side
    535.28x = 209,519.56
  5. Step 5: Solve for x
    x = 209,519.56/535.28
  6. Step 6: Final answer
    x = 391.42

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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.