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Finding the Fourth Proportional to 339.78, 510.06 and 186

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Solution

The fourth proportional to 339.78, 510.06 and 186 is: 279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.78 : 510.06 = 186 : x
  2. Step 2: Convert to fraction form
    339.78/510.06 = 186/x
  3. Step 3: Cross multiply
    339.78x = 510.06 × 186
  4. Step 4: Simplify right side
    339.78x = 94,871.16
  5. Step 5: Solve for x
    x = 94,871.16/339.78
  6. Step 6: Final answer
    x = 279.21

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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.