Home / 1,919.20-2,870.80-1,725.60

Finding the Fourth Proportional to 1,919.20, 2,870.80 and 1,725.60

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Solution

The fourth proportional to 1,919.20, 2,870.80 and 1,725.60 is: 2,581.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.20 : 2,870.80 = 1,725.60 : x
  2. Step 2: Convert to fraction form
    1,919.20/2,870.80 = 1,725.60/x
  3. Step 3: Cross multiply
    1,919.20x = 2,870.80 × 1,725.60
  4. Step 4: Simplify right side
    1,919.20x = 4,953,852.48
  5. Step 5: Solve for x
    x = 4,953,852.48/1,919.20
  6. Step 6: Final answer
    x = 2,581.21

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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.