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Finding the Fourth Proportional to 305.48, 458.45 and 213.58

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Solution

The fourth proportional to 305.48, 458.45 and 213.58 is: 320.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.48 : 458.45 = 213.58 : x
  2. Step 2: Convert to fraction form
    305.48/458.45 = 213.58/x
  3. Step 3: Cross multiply
    305.48x = 458.45 × 213.58
  4. Step 4: Simplify right side
    305.48x = 97,915.75
  5. Step 5: Solve for x
    x = 97,915.75/305.48
  6. Step 6: Final answer
    x = 320.53

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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.