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Finding the Fourth Proportional to 445.48, 615.54 and 320.92

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Solution

The fourth proportional to 445.48, 615.54 and 320.92 is: 443.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.48 : 615.54 = 320.92 : x
  2. Step 2: Convert to fraction form
    445.48/615.54 = 320.92/x
  3. Step 3: Cross multiply
    445.48x = 615.54 × 320.92
  4. Step 4: Simplify right side
    445.48x = 197,539.10
  5. Step 5: Solve for x
    x = 197,539.10/445.48
  6. Step 6: Final answer
    x = 443.43

Related Problems

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Double scale
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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.