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Finding the Fourth Proportional to 794.60, 1,096.40 and 515.15

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Solution

The fourth proportional to 794.60, 1,096.40 and 515.15 is: 710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.60 : 1,096.40 = 515.15 : x
  2. Step 2: Convert to fraction form
    794.60/1,096.40 = 515.15/x
  3. Step 3: Cross multiply
    794.60x = 1,096.40 × 515.15
  4. Step 4: Simplify right side
    794.60x = 564,810.46
  5. Step 5: Solve for x
    x = 564,810.46/794.60
  6. Step 6: Final answer
    x = 710.81

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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.