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Finding the Fourth Proportional to 1,603.11, 2,403.33 and 679.39

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Solution

The fourth proportional to 1,603.11, 2,403.33 and 679.39 is: 1,018.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.11 : 2,403.33 = 679.39 : x
  2. Step 2: Convert to fraction form
    1,603.11/2,403.33 = 679.39/x
  3. Step 3: Cross multiply
    1,603.11x = 2,403.33 × 679.39
  4. Step 4: Simplify right side
    1,603.11x = 1,632,798.37
  5. Step 5: Solve for x
    x = 1,632,798.37/1,603.11
  6. Step 6: Final answer
    x = 1,018.52

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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.