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Finding the Fourth Proportional to 1,400.85, 2,099.43 and 578.16

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Solution

The fourth proportional to 1,400.85, 2,099.43 and 578.16 is: 866.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.85 : 2,099.43 = 578.16 : x
  2. Step 2: Convert to fraction form
    1,400.85/2,099.43 = 578.16/x
  3. Step 3: Cross multiply
    1,400.85x = 2,099.43 × 578.16
  4. Step 4: Simplify right side
    1,400.85x = 1,213,806.45
  5. Step 5: Solve for x
    x = 1,213,806.45/1,400.85
  6. Step 6: Final answer
    x = 866.48

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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.