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Finding the Fourth Proportional to 1,890.72, 2,836.11 and 963.66

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Solution

The fourth proportional to 1,890.72, 2,836.11 and 963.66 is: 1,445.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.72 : 2,836.11 = 963.66 : x
  2. Step 2: Convert to fraction form
    1,890.72/2,836.11 = 963.66/x
  3. Step 3: Cross multiply
    1,890.72x = 2,836.11 × 963.66
  4. Step 4: Simplify right side
    1,890.72x = 2,733,045.76
  5. Step 5: Solve for x
    x = 2,733,045.76/1,890.72
  6. Step 6: Final answer
    x = 1,445.51

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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.