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Finding the Fourth Proportional to 535.16, 802.86 and 261.18

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Solution

The fourth proportional to 535.16, 802.86 and 261.18 is: 391.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.16 : 802.86 = 261.18 : x
  2. Step 2: Convert to fraction form
    535.16/802.86 = 261.18/x
  3. Step 3: Cross multiply
    535.16x = 802.86 × 261.18
  4. Step 4: Simplify right side
    535.16x = 209,690.97
  5. Step 5: Solve for x
    x = 209,690.97/535.16
  6. Step 6: Final answer
    x = 391.83

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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.