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Finding the Fourth Proportional to 541.89, 747.80 and 320.85

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Solution

The fourth proportional to 541.89, 747.80 and 320.85 is: 442.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.89 : 747.80 = 320.85 : x
  2. Step 2: Convert to fraction form
    541.89/747.80 = 320.85/x
  3. Step 3: Cross multiply
    541.89x = 747.80 × 320.85
  4. Step 4: Simplify right side
    541.89x = 239,930.03
  5. Step 5: Solve for x
    x = 239,930.03/541.89
  6. Step 6: Final answer
    x = 442.77

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1.5x scale

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.