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Finding the Fourth Proportional to 340.21, 510.35 and 123.73

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Solution

The fourth proportional to 340.21, 510.35 and 123.73 is: 185.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.21 : 510.35 = 123.73 : x
  2. Step 2: Convert to fraction form
    340.21/510.35 = 123.73/x
  3. Step 3: Cross multiply
    340.21x = 510.35 × 123.73
  4. Step 4: Simplify right side
    340.21x = 63,145.61
  5. Step 5: Solve for x
    x = 63,145.61/340.21
  6. Step 6: Final answer
    x = 185.61

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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.