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Finding the Fourth Proportional to 346.77, 520.12 and 90.29

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Solution

The fourth proportional to 346.77, 520.12 and 90.29 is: 135.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.77 : 520.12 = 90.29 : x
  2. Step 2: Convert to fraction form
    346.77/520.12 = 90.29/x
  3. Step 3: Cross multiply
    346.77x = 520.12 × 90.29
  4. Step 4: Simplify right side
    346.77x = 46,961.18
  5. Step 5: Solve for x
    x = 46,961.18/346.77
  6. Step 6: Final answer
    x = 135.42

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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.