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Finding the Fourth Proportional to 1,589.48, 2,385.22 and 859.54

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Solution

The fourth proportional to 1,589.48, 2,385.22 and 859.54 is: 1,289.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.48 : 2,385.22 = 859.54 : x
  2. Step 2: Convert to fraction form
    1,589.48/2,385.22 = 859.54/x
  3. Step 3: Cross multiply
    1,589.48x = 2,385.22 × 859.54
  4. Step 4: Simplify right side
    1,589.48x = 2,050,192.00
  5. Step 5: Solve for x
    x = 2,050,192.00/1,589.48
  6. Step 6: Final answer
    x = 1,289.85

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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.