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Finding the Fourth Proportional to 2,089.74, 3,134.61 and 856.87

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Solution

The fourth proportional to 2,089.74, 3,134.61 and 856.87 is: 1,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.74 : 3,134.61 = 856.87 : x
  2. Step 2: Convert to fraction form
    2,089.74/3,134.61 = 856.87/x
  3. Step 3: Cross multiply
    2,089.74x = 3,134.61 × 856.87
  4. Step 4: Simplify right side
    2,089.74x = 2,685,953.27
  5. Step 5: Solve for x
    x = 2,685,953.27/2,089.74
  6. Step 6: Final answer
    x = 1,285.31

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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.