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Finding the Fourth Proportional to 535.52, 802.56 and 318.80

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Solution

The fourth proportional to 535.52, 802.56 and 318.80 is: 477.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.52 : 802.56 = 318.80 : x
  2. Step 2: Convert to fraction form
    535.52/802.56 = 318.80/x
  3. Step 3: Cross multiply
    535.52x = 802.56 × 318.80
  4. Step 4: Simplify right side
    535.52x = 255,856.13
  5. Step 5: Solve for x
    x = 255,856.13/535.52
  6. Step 6: Final answer
    x = 477.77

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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.