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Finding the Fourth Proportional to 979.84, 1,350 and 955.48

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Solution

The fourth proportional to 979.84, 1,350 and 955.48 is: 1,316.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.84 : 1,350 = 955.48 : x
  2. Step 2: Convert to fraction form
    979.84/1,350 = 955.48/x
  3. Step 3: Cross multiply
    979.84x = 1,350 × 955.48
  4. Step 4: Simplify right side
    979.84x = 1,289,898
  5. Step 5: Solve for x
    x = 1,289,898/979.84
  6. Step 6: Final answer
    x = 1,316.44

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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.