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Finding the Fourth Proportional to 346.45, 519.57 and 129.98

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Solution

The fourth proportional to 346.45, 519.57 and 129.98 is: 194.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.45 : 519.57 = 129.98 : x
  2. Step 2: Convert to fraction form
    346.45/519.57 = 129.98/x
  3. Step 3: Cross multiply
    346.45x = 519.57 × 129.98
  4. Step 4: Simplify right side
    346.45x = 67,531.11
  5. Step 5: Solve for x
    x = 67,531.11/346.45
  6. Step 6: Final answer
    x = 194.92

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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.