Home / 3,125.40-4,684.45-1,390.38

Finding the Fourth Proportional to 3,125.40, 4,684.45 and 1,390.38

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Solution

The fourth proportional to 3,125.40, 4,684.45 and 1,390.38 is: 2,083.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.40 : 4,684.45 = 1,390.38 : x
  2. Step 2: Convert to fraction form
    3,125.40/4,684.45 = 1,390.38/x
  3. Step 3: Cross multiply
    3,125.40x = 4,684.45 × 1,390.38
  4. Step 4: Simplify right side
    3,125.40x = 6,513,165.59
  5. Step 5: Solve for x
    x = 6,513,165.59/3,125.40
  6. Step 6: Final answer
    x = 2,083.95

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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.