Home / 1,400.28-2,100.77-578.79

Finding the Fourth Proportional to 1,400.28, 2,100.77 and 578.79

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Solution

The fourth proportional to 1,400.28, 2,100.77 and 578.79 is: 868.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.28 : 2,100.77 = 578.79 : x
  2. Step 2: Convert to fraction form
    1,400.28/2,100.77 = 578.79/x
  3. Step 3: Cross multiply
    1,400.28x = 2,100.77 × 578.79
  4. Step 4: Simplify right side
    1,400.28x = 1,215,903.94
  5. Step 5: Solve for x
    x = 1,215,903.94/1,400.28
  6. Step 6: Final answer
    x = 868.33

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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.