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Finding the Fourth Proportional to 643.70, 886.80 and 532.83

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Solution

The fourth proportional to 643.70, 886.80 and 532.83 is: 734.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.70 : 886.80 = 532.83 : x
  2. Step 2: Convert to fraction form
    643.70/886.80 = 532.83/x
  3. Step 3: Cross multiply
    643.70x = 886.80 × 532.83
  4. Step 4: Simplify right side
    643.70x = 472,513.64
  5. Step 5: Solve for x
    x = 472,513.64/643.70
  6. Step 6: Final answer
    x = 734.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.