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Finding the Fourth Proportional to 795.90, 1,097.94 and 515.79

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Solution

The fourth proportional to 795.90, 1,097.94 and 515.79 is: 711.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.90 : 1,097.94 = 515.79 : x
  2. Step 2: Convert to fraction form
    795.90/1,097.94 = 515.79/x
  3. Step 3: Cross multiply
    795.90x = 1,097.94 × 515.79
  4. Step 4: Simplify right side
    795.90x = 566,306.47
  5. Step 5: Solve for x
    x = 566,306.47/795.90
  6. Step 6: Final answer
    x = 711.53

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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.