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Finding the Fourth Proportional to 1,426.54, 2,139.66 and 452.65

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Solution

The fourth proportional to 1,426.54, 2,139.66 and 452.65 is: 678.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.54 : 2,139.66 = 452.65 : x
  2. Step 2: Convert to fraction form
    1,426.54/2,139.66 = 452.65/x
  3. Step 3: Cross multiply
    1,426.54x = 2,139.66 × 452.65
  4. Step 4: Simplify right side
    1,426.54x = 968,517.10
  5. Step 5: Solve for x
    x = 968,517.10/1,426.54
  6. Step 6: Final answer
    x = 678.93

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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.