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Finding the Fourth Proportional to 5,678.78, 7,836.06 and 3,288.80

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Solution

The fourth proportional to 5,678.78, 7,836.06 and 3,288.80 is: 4,538.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.78 : 7,836.06 = 3,288.80 : x
  2. Step 2: Convert to fraction form
    5,678.78/7,836.06 = 3,288.80/x
  3. Step 3: Cross multiply
    5,678.78x = 7,836.06 × 3,288.80
  4. Step 4: Simplify right side
    5,678.78x = 25,771,234.13
  5. Step 5: Solve for x
    x = 25,771,234.13/5,678.78
  6. Step 6: Final answer
    x = 4,538.16

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1.5x scale

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.