Home / 1,400.32-2,100.08-668.44

Finding the Fourth Proportional to 1,400.32, 2,100.08 and 668.44

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Solution

The fourth proportional to 1,400.32, 2,100.08 and 668.44 is: 1,002.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.32 : 2,100.08 = 668.44 : x
  2. Step 2: Convert to fraction form
    1,400.32/2,100.08 = 668.44/x
  3. Step 3: Cross multiply
    1,400.32x = 2,100.08 × 668.44
  4. Step 4: Simplify right side
    1,400.32x = 1,403,777.48
  5. Step 5: Solve for x
    x = 1,403,777.48/1,400.32
  6. Step 6: Final answer
    x = 1,002.47

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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.