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Finding the Fourth Proportional to 1,427.71, 2,139.36 and 963.67

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Solution

The fourth proportional to 1,427.71, 2,139.36 and 963.67 is: 1,444.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.71 : 2,139.36 = 963.67 : x
  2. Step 2: Convert to fraction form
    1,427.71/2,139.36 = 963.67/x
  3. Step 3: Cross multiply
    1,427.71x = 2,139.36 × 963.67
  4. Step 4: Simplify right side
    1,427.71x = 2,061,637.05
  5. Step 5: Solve for x
    x = 2,061,637.05/1,427.71
  6. Step 6: Final answer
    x = 1,444.02

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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.