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Finding the Fourth Proportional to 1,425.89, 2,139.03 and 452.07

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Solution

The fourth proportional to 1,425.89, 2,139.03 and 452.07 is: 678.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.89 : 2,139.03 = 452.07 : x
  2. Step 2: Convert to fraction form
    1,425.89/2,139.03 = 452.07/x
  3. Step 3: Cross multiply
    1,425.89x = 2,139.03 × 452.07
  4. Step 4: Simplify right side
    1,425.89x = 966,991.29
  5. Step 5: Solve for x
    x = 966,991.29/1,425.89
  6. Step 6: Final answer
    x = 678.17

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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.