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Finding the Fourth Proportional to 643.02, 963.18 and 533.07

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Solution

The fourth proportional to 643.02, 963.18 and 533.07 is: 798.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.02 : 963.18 = 533.07 : x
  2. Step 2: Convert to fraction form
    643.02/963.18 = 533.07/x
  3. Step 3: Cross multiply
    643.02x = 963.18 × 533.07
  4. Step 4: Simplify right side
    643.02x = 513,446.17
  5. Step 5: Solve for x
    x = 513,446.17/643.02
  6. Step 6: Final answer
    x = 798.49

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Double scale
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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.