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Finding the Fourth Proportional to 642.23, 964.65 and 566.90

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Solution

The fourth proportional to 642.23, 964.65 and 566.90 is: 851.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.23 : 964.65 = 566.90 : x
  2. Step 2: Convert to fraction form
    642.23/964.65 = 566.90/x
  3. Step 3: Cross multiply
    642.23x = 964.65 × 566.90
  4. Step 4: Simplify right side
    642.23x = 546,860.09
  5. Step 5: Solve for x
    x = 546,860.09/642.23
  6. Step 6: Final answer
    x = 851.50

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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.