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Finding the Fourth Proportional to 1,979.40, 2,966.70 and 882.60

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Solution

The fourth proportional to 1,979.40, 2,966.70 and 882.60 is: 1,322.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.40 : 2,966.70 = 882.60 : x
  2. Step 2: Convert to fraction form
    1,979.40/2,966.70 = 882.60/x
  3. Step 3: Cross multiply
    1,979.40x = 2,966.70 × 882.60
  4. Step 4: Simplify right side
    1,979.40x = 2,618,409.42
  5. Step 5: Solve for x
    x = 2,618,409.42/1,979.40
  6. Step 6: Final answer
    x = 1,322.83

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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.