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Finding the Fourth Proportional to 541.58, 747.15 and 320.54

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Solution

The fourth proportional to 541.58, 747.15 and 320.54 is: 442.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.58 : 747.15 = 320.54 : x
  2. Step 2: Convert to fraction form
    541.58/747.15 = 320.54/x
  3. Step 3: Cross multiply
    541.58x = 747.15 × 320.54
  4. Step 4: Simplify right side
    541.58x = 239,491.46
  5. Step 5: Solve for x
    x = 239,491.46/541.58
  6. Step 6: Final answer
    x = 442.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.