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Finding the Fourth Proportional to 541.49, 812.21 and 216.90

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Solution

The fourth proportional to 541.49, 812.21 and 216.90 is: 325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.49 : 812.21 = 216.90 : x
  2. Step 2: Convert to fraction form
    541.49/812.21 = 216.90/x
  3. Step 3: Cross multiply
    541.49x = 812.21 × 216.90
  4. Step 4: Simplify right side
    541.49x = 176,167.26
  5. Step 5: Solve for x
    x = 176,167.26/541.49
  6. Step 6: Final answer
    x = 325.34

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Double scale
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Similar ratio
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1.5x scale

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.