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Finding the Fourth Proportional to 515.25, 710.82 and 328.83

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Solution

The fourth proportional to 515.25, 710.82 and 328.83 is: 453.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.25 : 710.82 = 328.83 : x
  2. Step 2: Convert to fraction form
    515.25/710.82 = 328.83/x
  3. Step 3: Cross multiply
    515.25x = 710.82 × 328.83
  4. Step 4: Simplify right side
    515.25x = 233,738.94
  5. Step 5: Solve for x
    x = 233,738.94/515.25
  6. Step 6: Final answer
    x = 453.64

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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.