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Finding the Fourth Proportional to 346.90, 520.41 and 103.40

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Solution

The fourth proportional to 346.90, 520.41 and 103.40 is: 155.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.90 : 520.41 = 103.40 : x
  2. Step 2: Convert to fraction form
    346.90/520.41 = 103.40/x
  3. Step 3: Cross multiply
    346.90x = 520.41 × 103.40
  4. Step 4: Simplify right side
    346.90x = 53,810.39
  5. Step 5: Solve for x
    x = 53,810.39/346.90
  6. Step 6: Final answer
    x = 155.12

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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.