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Finding the Fourth Proportional to 517.59, 775.63 and 395.48

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Solution

The fourth proportional to 517.59, 775.63 and 395.48 is: 592.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.59 : 775.63 = 395.48 : x
  2. Step 2: Convert to fraction form
    517.59/775.63 = 395.48/x
  3. Step 3: Cross multiply
    517.59x = 775.63 × 395.48
  4. Step 4: Simplify right side
    517.59x = 306,746.36
  5. Step 5: Solve for x
    x = 306,746.36/517.59
  6. Step 6: Final answer
    x = 592.64

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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.