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Finding the Fourth Proportional to 5,266.88, 7,900.08 and 1,979.72

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Solution

The fourth proportional to 5,266.88, 7,900.08 and 1,979.72 is: 2,969.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,266.88 : 7,900.08 = 1,979.72 : x
  2. Step 2: Convert to fraction form
    5,266.88/7,900.08 = 1,979.72/x
  3. Step 3: Cross multiply
    5,266.88x = 7,900.08 × 1,979.72
  4. Step 4: Simplify right side
    5,266.88x = 15,639,946.38
  5. Step 5: Solve for x
    x = 15,639,946.38/5,266.88
  6. Step 6: Final answer
    x = 2,969.49

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1.5x scale

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.