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Finding the Fourth Proportional to 716.35, 1,068.81 and 612.49

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Solution

The fourth proportional to 716.35, 1,068.81 and 612.49 is: 913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.35 : 1,068.81 = 612.49 : x
  2. Step 2: Convert to fraction form
    716.35/1,068.81 = 612.49/x
  3. Step 3: Cross multiply
    716.35x = 1,068.81 × 612.49
  4. Step 4: Simplify right side
    716.35x = 654,635.44
  5. Step 5: Solve for x
    x = 654,635.44/716.35
  6. Step 6: Final answer
    x = 913.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.