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Finding the Fourth Proportional to 346.89, 520.40 and 154.53

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Solution

The fourth proportional to 346.89, 520.40 and 154.53 is: 231.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.89 : 520.40 = 154.53 : x
  2. Step 2: Convert to fraction form
    346.89/520.40 = 154.53/x
  3. Step 3: Cross multiply
    346.89x = 520.40 × 154.53
  4. Step 4: Simplify right side
    346.89x = 80,416.64
  5. Step 5: Solve for x
    x = 80,416.64/346.89
  6. Step 6: Final answer
    x = 231.82

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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.