Home / 2,415.40-3,617.70-1,259.80

Finding the Fourth Proportional to 2,415.40, 3,617.70 and 1,259.80

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Solution

The fourth proportional to 2,415.40, 3,617.70 and 1,259.80 is: 1,886.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.40 : 3,617.70 = 1,259.80 : x
  2. Step 2: Convert to fraction form
    2,415.40/3,617.70 = 1,259.80/x
  3. Step 3: Cross multiply
    2,415.40x = 3,617.70 × 1,259.80
  4. Step 4: Simplify right side
    2,415.40x = 4,557,578.46
  5. Step 5: Solve for x
    x = 4,557,578.46/2,415.40
  6. Step 6: Final answer
    x = 1,886.88

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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.