Home / 1,875.06-2,811.42-720.54

Finding the Fourth Proportional to 1,875.06, 2,811.42 and 720.54

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Solution

The fourth proportional to 1,875.06, 2,811.42 and 720.54 is: 1,080.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.06 : 2,811.42 = 720.54 : x
  2. Step 2: Convert to fraction form
    1,875.06/2,811.42 = 720.54/x
  3. Step 3: Cross multiply
    1,875.06x = 2,811.42 × 720.54
  4. Step 4: Simplify right side
    1,875.06x = 2,025,740.57
  5. Step 5: Solve for x
    x = 2,025,740.57/1,875.06
  6. Step 6: Final answer
    x = 1,080.36

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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.