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Finding the Fourth Proportional to 345.59, 515.09 and 326.13

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Solution

The fourth proportional to 345.59, 515.09 and 326.13 is: 486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.59 : 515.09 = 326.13 : x
  2. Step 2: Convert to fraction form
    345.59/515.09 = 326.13/x
  3. Step 3: Cross multiply
    345.59x = 515.09 × 326.13
  4. Step 4: Simplify right side
    345.59x = 167,986.30
  5. Step 5: Solve for x
    x = 167,986.30/345.59
  6. Step 6: Final answer
    x = 486.09

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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.