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Finding the Fourth Proportional to 1,603.63, 2,403.87 and 679.42

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Solution

The fourth proportional to 1,603.63, 2,403.87 and 679.42 is: 1,018.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.63 : 2,403.87 = 679.42 : x
  2. Step 2: Convert to fraction form
    1,603.63/2,403.87 = 679.42/x
  3. Step 3: Cross multiply
    1,603.63x = 2,403.87 × 679.42
  4. Step 4: Simplify right side
    1,603.63x = 1,633,237.36
  5. Step 5: Solve for x
    x = 1,633,237.36/1,603.63
  6. Step 6: Final answer
    x = 1,018.46

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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.