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Finding the Fourth Proportional to 541.51, 811.42 and 321.70

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Solution

The fourth proportional to 541.51, 811.42 and 321.70 is: 482.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.51 : 811.42 = 321.70 : x
  2. Step 2: Convert to fraction form
    541.51/811.42 = 321.70/x
  3. Step 3: Cross multiply
    541.51x = 811.42 × 321.70
  4. Step 4: Simplify right side
    541.51x = 261,033.81
  5. Step 5: Solve for x
    x = 261,033.81/541.51
  6. Step 6: Final answer
    x = 482.05

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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.