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Finding the Fourth Proportional to 1,399.86, 2,100.06 and 475.38

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Solution

The fourth proportional to 1,399.86, 2,100.06 and 475.38 is: 713.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.86 : 2,100.06 = 475.38 : x
  2. Step 2: Convert to fraction form
    1,399.86/2,100.06 = 475.38/x
  3. Step 3: Cross multiply
    1,399.86x = 2,100.06 × 475.38
  4. Step 4: Simplify right side
    1,399.86x = 998,326.52
  5. Step 5: Solve for x
    x = 998,326.52/1,399.86
  6. Step 6: Final answer
    x = 713.16

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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.