Home / 1,875.60-2,811.68-720.48

Finding the Fourth Proportional to 1,875.60, 2,811.68 and 720.48

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Solution

The fourth proportional to 1,875.60, 2,811.68 and 720.48 is: 1,080.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.60 : 2,811.68 = 720.48 : x
  2. Step 2: Convert to fraction form
    1,875.60/2,811.68 = 720.48/x
  3. Step 3: Cross multiply
    1,875.60x = 2,811.68 × 720.48
  4. Step 4: Simplify right side
    1,875.60x = 2,025,759.21
  5. Step 5: Solve for x
    x = 2,025,759.21/1,875.60
  6. Step 6: Final answer
    x = 1,080.06

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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.