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Finding the Fourth Proportional to 2,406.15, 3,603.15 and 1,920.15

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Solution

The fourth proportional to 2,406.15, 3,603.15 and 1,920.15 is: 2,875.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,406.15 : 3,603.15 = 1,920.15 : x
  2. Step 2: Convert to fraction form
    2,406.15/3,603.15 = 1,920.15/x
  3. Step 3: Cross multiply
    2,406.15x = 3,603.15 × 1,920.15
  4. Step 4: Simplify right side
    2,406.15x = 6,918,588.47
  5. Step 5: Solve for x
    x = 6,918,588.47/2,406.15
  6. Step 6: Final answer
    x = 2,875.38

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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.