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Finding the Fourth Proportional to 1,859.74, 2,790.22 and 885.72

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Solution

The fourth proportional to 1,859.74, 2,790.22 and 885.72 is: 1,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.74 : 2,790.22 = 885.72 : x
  2. Step 2: Convert to fraction form
    1,859.74/2,790.22 = 885.72/x
  3. Step 3: Cross multiply
    1,859.74x = 2,790.22 × 885.72
  4. Step 4: Simplify right side
    1,859.74x = 2,471,353.66
  5. Step 5: Solve for x
    x = 2,471,353.66/1,859.74
  6. Step 6: Final answer
    x = 1,328.87

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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.