Home / 3,657.20-5,486.40-1,578.74

Finding the Fourth Proportional to 3,657.20, 5,486.40 and 1,578.74

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Solution

The fourth proportional to 3,657.20, 5,486.40 and 1,578.74 is: 2,368.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,657.20 : 5,486.40 = 1,578.74 : x
  2. Step 2: Convert to fraction form
    3,657.20/5,486.40 = 1,578.74/x
  3. Step 3: Cross multiply
    3,657.20x = 5,486.40 × 1,578.74
  4. Step 4: Simplify right side
    3,657.20x = 8,661,571.70
  5. Step 5: Solve for x
    x = 8,661,571.70/3,657.20
  6. Step 6: Final answer
    x = 2,368.36

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1.5x scale

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.