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Finding the Fourth Proportional to 1,603.14, 2,402.31 and 725.15

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Solution

The fourth proportional to 1,603.14, 2,402.31 and 725.15 is: 1,086.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.14 : 2,402.31 = 725.15 : x
  2. Step 2: Convert to fraction form
    1,603.14/2,402.31 = 725.15/x
  3. Step 3: Cross multiply
    1,603.14x = 2,402.31 × 725.15
  4. Step 4: Simplify right side
    1,603.14x = 1,742,039.74
  5. Step 5: Solve for x
    x = 1,742,039.74/1,603.14
  6. Step 6: Final answer
    x = 1,086.64

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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.