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Finding the Fourth Proportional to 1,203.98, 1,805.91 and 657.23

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Solution

The fourth proportional to 1,203.98, 1,805.91 and 657.23 is: 985.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.98 : 1,805.91 = 657.23 : x
  2. Step 2: Convert to fraction form
    1,203.98/1,805.91 = 657.23/x
  3. Step 3: Cross multiply
    1,203.98x = 1,805.91 × 657.23
  4. Step 4: Simplify right side
    1,203.98x = 1,186,889.20
  5. Step 5: Solve for x
    x = 1,186,889.20/1,203.98
  6. Step 6: Final answer
    x = 985.81

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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.