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Finding the Fourth Proportional to 620, 925.66 and 528.74

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Solution

The fourth proportional to 620, 925.66 and 528.74 is: 789.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    620 : 925.66 = 528.74 : x
  2. Step 2: Convert to fraction form
    620/925.66 = 528.74/x
  3. Step 3: Cross multiply
    620x = 925.66 × 528.74
  4. Step 4: Simplify right side
    620x = 489,433.47
  5. Step 5: Solve for x
    x = 489,433.47/620
  6. Step 6: Final answer
    x = 789.41

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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.