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Finding the Fourth Proportional to 346.96, 520.39 and 103.47

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Solution

The fourth proportional to 346.96, 520.39 and 103.47 is: 155.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.96 : 520.39 = 103.47 : x
  2. Step 2: Convert to fraction form
    346.96/520.39 = 103.47/x
  3. Step 3: Cross multiply
    346.96x = 520.39 × 103.47
  4. Step 4: Simplify right side
    346.96x = 53,844.75
  5. Step 5: Solve for x
    x = 53,844.75/346.96
  6. Step 6: Final answer
    x = 155.19

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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.