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Finding the Fourth Proportional to 642.58, 963.06 and 535.66

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Solution

The fourth proportional to 642.58, 963.06 and 535.66 is: 802.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.58 : 963.06 = 535.66 : x
  2. Step 2: Convert to fraction form
    642.58/963.06 = 535.66/x
  3. Step 3: Cross multiply
    642.58x = 963.06 × 535.66
  4. Step 4: Simplify right side
    642.58x = 515,876.47
  5. Step 5: Solve for x
    x = 515,876.47/642.58
  6. Step 6: Final answer
    x = 802.82

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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.