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Finding the Fourth Proportional to 375.48, 518.40 and 298.80

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Solution

The fourth proportional to 375.48, 518.40 and 298.80 is: 412.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.48 : 518.40 = 298.80 : x
  2. Step 2: Convert to fraction form
    375.48/518.40 = 298.80/x
  3. Step 3: Cross multiply
    375.48x = 518.40 × 298.80
  4. Step 4: Simplify right side
    375.48x = 154,897.92
  5. Step 5: Solve for x
    x = 154,897.92/375.48
  6. Step 6: Final answer
    x = 412.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.