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Finding the Fourth Proportional to 541.12, 746.70 and 331.40

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Solution

The fourth proportional to 541.12, 746.70 and 331.40 is: 457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.12 : 746.70 = 331.40 : x
  2. Step 2: Convert to fraction form
    541.12/746.70 = 331.40/x
  3. Step 3: Cross multiply
    541.12x = 746.70 × 331.40
  4. Step 4: Simplify right side
    541.12x = 247,456.38
  5. Step 5: Solve for x
    x = 247,456.38/541.12
  6. Step 6: Final answer
    x = 457.30

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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.