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Finding the Fourth Proportional to 620.61, 925.68 and 528.27

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Solution

The fourth proportional to 620.61, 925.68 and 528.27 is: 787.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.61 : 925.68 = 528.27 : x
  2. Step 2: Convert to fraction form
    620.61/925.68 = 528.27/x
  3. Step 3: Cross multiply
    620.61x = 925.68 × 528.27
  4. Step 4: Simplify right side
    620.61x = 489,009.72
  5. Step 5: Solve for x
    x = 489,009.72/620.61
  6. Step 6: Final answer
    x = 787.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.