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Finding the Fourth Proportional to 541.23, 811.74 and 145.91

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Solution

The fourth proportional to 541.23, 811.74 and 145.91 is: 218.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.23 : 811.74 = 145.91 : x
  2. Step 2: Convert to fraction form
    541.23/811.74 = 145.91/x
  3. Step 3: Cross multiply
    541.23x = 811.74 × 145.91
  4. Step 4: Simplify right side
    541.23x = 118,440.98
  5. Step 5: Solve for x
    x = 118,440.98/541.23
  6. Step 6: Final answer
    x = 218.84

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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.