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Finding the Fourth Proportional to 566.20, 850.11 and 420.40

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Solution

The fourth proportional to 566.20, 850.11 and 420.40 is: 631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.20 : 850.11 = 420.40 : x
  2. Step 2: Convert to fraction form
    566.20/850.11 = 420.40/x
  3. Step 3: Cross multiply
    566.20x = 850.11 × 420.40
  4. Step 4: Simplify right side
    566.20x = 357,383.07
  5. Step 5: Solve for x
    x = 357,383.07/566.20
  6. Step 6: Final answer
    x = 631.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.