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Finding the Fourth Proportional to 528.67, 789.13 and 490.60

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Solution

The fourth proportional to 528.67, 789.13 and 490.60 is: 732.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.67 : 789.13 = 490.60 : x
  2. Step 2: Convert to fraction form
    528.67/789.13 = 490.60/x
  3. Step 3: Cross multiply
    528.67x = 789.13 × 490.60
  4. Step 4: Simplify right side
    528.67x = 387,147.18
  5. Step 5: Solve for x
    x = 387,147.18/528.67
  6. Step 6: Final answer
    x = 732.30

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1.5x scale

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.