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Finding the Fourth Proportional to 566.60, 849.90 and 215.20

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Solution

The fourth proportional to 566.60, 849.90 and 215.20 is: 322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.60 : 849.90 = 215.20 : x
  2. Step 2: Convert to fraction form
    566.60/849.90 = 215.20/x
  3. Step 3: Cross multiply
    566.60x = 849.90 × 215.20
  4. Step 4: Simplify right side
    566.60x = 182,898.48
  5. Step 5: Solve for x
    x = 182,898.48/566.60
  6. Step 6: Final answer
    x = 322.80

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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.