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Finding the Fourth Proportional to 340.86, 510.90 and 186.72

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Solution

The fourth proportional to 340.86, 510.90 and 186.72 is: 279.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.86 : 510.90 = 186.72 : x
  2. Step 2: Convert to fraction form
    340.86/510.90 = 186.72/x
  3. Step 3: Cross multiply
    340.86x = 510.90 × 186.72
  4. Step 4: Simplify right side
    340.86x = 95,395.25
  5. Step 5: Solve for x
    x = 95,395.25/340.86
  6. Step 6: Final answer
    x = 279.87

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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.