Home / 1,875.09-2,811.11-780.24

Finding the Fourth Proportional to 1,875.09, 2,811.11 and 780.24

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Solution

The fourth proportional to 1,875.09, 2,811.11 and 780.24 is: 1,169.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.09 : 2,811.11 = 780.24 : x
  2. Step 2: Convert to fraction form
    1,875.09/2,811.11 = 780.24/x
  3. Step 3: Cross multiply
    1,875.09x = 2,811.11 × 780.24
  4. Step 4: Simplify right side
    1,875.09x = 2,193,336.57
  5. Step 5: Solve for x
    x = 2,193,336.57/1,875.09
  6. Step 6: Final answer
    x = 1,169.72

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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.