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Finding the Fourth Proportional to 979.66, 1,468.32 and 746.74

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Solution

The fourth proportional to 979.66, 1,468.32 and 746.74 is: 1,119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.66 : 1,468.32 = 746.74 : x
  2. Step 2: Convert to fraction form
    979.66/1,468.32 = 746.74/x
  3. Step 3: Cross multiply
    979.66x = 1,468.32 × 746.74
  4. Step 4: Simplify right side
    979.66x = 1,096,453.28
  5. Step 5: Solve for x
    x = 1,096,453.28/979.66
  6. Step 6: Final answer
    x = 1,119.22

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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.