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Finding the Fourth Proportional to 3,456.21, 5,184.31 and 859.15

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Solution

The fourth proportional to 3,456.21, 5,184.31 and 859.15 is: 1,288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,456.21 : 5,184.31 = 859.15 : x
  2. Step 2: Convert to fraction form
    3,456.21/5,184.31 = 859.15/x
  3. Step 3: Cross multiply
    3,456.21x = 5,184.31 × 859.15
  4. Step 4: Simplify right side
    3,456.21x = 4,454,095.60
  5. Step 5: Solve for x
    x = 4,454,095.60/3,456.21
  6. Step 6: Final answer
    x = 1,288.72

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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.