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Finding the Fourth Proportional to 620.89, 855.30 and 532.08

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Solution

The fourth proportional to 620.89, 855.30 and 532.08 is: 732.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.89 : 855.30 = 532.08 : x
  2. Step 2: Convert to fraction form
    620.89/855.30 = 532.08/x
  3. Step 3: Cross multiply
    620.89x = 855.30 × 532.08
  4. Step 4: Simplify right side
    620.89x = 455,081.09
  5. Step 5: Solve for x
    x = 455,081.09/620.89
  6. Step 6: Final answer
    x = 732.96

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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.