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Finding the Fourth Proportional to 5,645.14, 7,789.80 and 3,406.20

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Solution

The fourth proportional to 5,645.14, 7,789.80 and 3,406.20 is: 4,700.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.14 : 7,789.80 = 3,406.20 : x
  2. Step 2: Convert to fraction form
    5,645.14/7,789.80 = 3,406.20/x
  3. Step 3: Cross multiply
    5,645.14x = 7,789.80 × 3,406.20
  4. Step 4: Simplify right side
    5,645.14x = 26,533,616.76
  5. Step 5: Solve for x
    x = 26,533,616.76/5,645.14
  6. Step 6: Final answer
    x = 4,700.26

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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.