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Finding the Fourth Proportional to 346.90, 520.32 and 103.43

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Solution

The fourth proportional to 346.90, 520.32 and 103.43 is: 155.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.90 : 520.32 = 103.43 : x
  2. Step 2: Convert to fraction form
    346.90/520.32 = 103.43/x
  3. Step 3: Cross multiply
    346.90x = 520.32 × 103.43
  4. Step 4: Simplify right side
    346.90x = 53,814.59
  5. Step 5: Solve for x
    x = 53,814.59/346.90
  6. Step 6: Final answer
    x = 155.13

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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.