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Finding the Fourth Proportional to 1,400.85, 2,101.39 and 578.97

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Solution

The fourth proportional to 1,400.85, 2,101.39 and 578.97 is: 868.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.85 : 2,101.39 = 578.97 : x
  2. Step 2: Convert to fraction form
    1,400.85/2,101.39 = 578.97/x
  3. Step 3: Cross multiply
    1,400.85x = 2,101.39 × 578.97
  4. Step 4: Simplify right side
    1,400.85x = 1,216,641.77
  5. Step 5: Solve for x
    x = 1,216,641.77/1,400.85
  6. Step 6: Final answer
    x = 868.50

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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.