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Finding the Fourth Proportional to 5,267.78, 7,900.23 and 1,979.08

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Solution

The fourth proportional to 5,267.78, 7,900.23 and 1,979.08 is: 2,968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,267.78 : 7,900.23 = 1,979.08 : x
  2. Step 2: Convert to fraction form
    5,267.78/7,900.23 = 1,979.08/x
  3. Step 3: Cross multiply
    5,267.78x = 7,900.23 × 1,979.08
  4. Step 4: Simplify right side
    5,267.78x = 15,635,219.30
  5. Step 5: Solve for x
    x = 15,635,219.30/5,267.78
  6. Step 6: Final answer
    x = 2,968.08

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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.