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Finding the Fourth Proportional to 621.15, 855.66 and 532.34

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Solution

The fourth proportional to 621.15, 855.66 and 532.34 is: 733.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.15 : 855.66 = 532.34 : x
  2. Step 2: Convert to fraction form
    621.15/855.66 = 532.34/x
  3. Step 3: Cross multiply
    621.15x = 855.66 × 532.34
  4. Step 4: Simplify right side
    621.15x = 455,497.77
  5. Step 5: Solve for x
    x = 455,497.77/621.15
  6. Step 6: Final answer
    x = 733.31

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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.