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Finding the Fourth Proportional to 346.81, 520.29 and 103.35

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Solution

The fourth proportional to 346.81, 520.29 and 103.35 is: 155.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.81 : 520.29 = 103.35 : x
  2. Step 2: Convert to fraction form
    346.81/520.29 = 103.35/x
  3. Step 3: Cross multiply
    346.81x = 520.29 × 103.35
  4. Step 4: Simplify right side
    346.81x = 53,771.97
  5. Step 5: Solve for x
    x = 53,771.97/346.81
  6. Step 6: Final answer
    x = 155.05

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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.