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Finding the Fourth Proportional to 2,632.14, 3,947.90 and 684.49

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Solution

The fourth proportional to 2,632.14, 3,947.90 and 684.49 is: 1,026.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,632.14 : 3,947.90 = 684.49 : x
  2. Step 2: Convert to fraction form
    2,632.14/3,947.90 = 684.49/x
  3. Step 3: Cross multiply
    2,632.14x = 3,947.90 × 684.49
  4. Step 4: Simplify right side
    2,632.14x = 2,702,307.94
  5. Step 5: Solve for x
    x = 2,702,307.94/2,632.14
  6. Step 6: Final answer
    x = 1,026.66

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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.