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Finding the Fourth Proportional to 360.72, 538.20 and 346.68

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Solution

The fourth proportional to 360.72, 538.20 and 346.68 is: 517.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.72 : 538.20 = 346.68 : x
  2. Step 2: Convert to fraction form
    360.72/538.20 = 346.68/x
  3. Step 3: Cross multiply
    360.72x = 538.20 × 346.68
  4. Step 4: Simplify right side
    360.72x = 186,583.18
  5. Step 5: Solve for x
    x = 186,583.18/360.72
  6. Step 6: Final answer
    x = 517.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.