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Finding the Fourth Proportional to 515.98, 712.20 and 348.13

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Solution

The fourth proportional to 515.98, 712.20 and 348.13 is: 480.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.98 : 712.20 = 348.13 : x
  2. Step 2: Convert to fraction form
    515.98/712.20 = 348.13/x
  3. Step 3: Cross multiply
    515.98x = 712.20 × 348.13
  4. Step 4: Simplify right side
    515.98x = 247,938.19
  5. Step 5: Solve for x
    x = 247,938.19/515.98
  6. Step 6: Final answer
    x = 480.52

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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.