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Finding the Fourth Proportional to 515.59, 711.54 and 282.73

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Solution

The fourth proportional to 515.59, 711.54 and 282.73 is: 390.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.59 : 711.54 = 282.73 : x
  2. Step 2: Convert to fraction form
    515.59/711.54 = 282.73/x
  3. Step 3: Cross multiply
    515.59x = 711.54 × 282.73
  4. Step 4: Simplify right side
    515.59x = 201,173.70
  5. Step 5: Solve for x
    x = 201,173.70/515.59
  6. Step 6: Final answer
    x = 390.18

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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.