Home / 1,911.80-2,867.68-525.14

Finding the Fourth Proportional to 1,911.80, 2,867.68 and 525.14

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Solution

The fourth proportional to 1,911.80, 2,867.68 and 525.14 is: 787.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.80 : 2,867.68 = 525.14 : x
  2. Step 2: Convert to fraction form
    1,911.80/2,867.68 = 525.14/x
  3. Step 3: Cross multiply
    1,911.80x = 2,867.68 × 525.14
  4. Step 4: Simplify right side
    1,911.80x = 1,505,933.48
  5. Step 5: Solve for x
    x = 1,505,933.48/1,911.80
  6. Step 6: Final answer
    x = 787.70

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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.