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Finding the Fourth Proportional to 541.78, 812.58 and 217.06

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Solution

The fourth proportional to 541.78, 812.58 and 217.06 is: 325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.78 : 812.58 = 217.06 : x
  2. Step 2: Convert to fraction form
    541.78/812.58 = 217.06/x
  3. Step 3: Cross multiply
    541.78x = 812.58 × 217.06
  4. Step 4: Simplify right side
    541.78x = 176,378.61
  5. Step 5: Solve for x
    x = 176,378.61/541.78
  6. Step 6: Final answer
    x = 325.55

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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.