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Finding the Fourth Proportional to 1,165.89, 1,749.93 and 426.22

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Solution

The fourth proportional to 1,165.89, 1,749.93 and 426.22 is: 639.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.89 : 1,749.93 = 426.22 : x
  2. Step 2: Convert to fraction form
    1,165.89/1,749.93 = 426.22/x
  3. Step 3: Cross multiply
    1,165.89x = 1,749.93 × 426.22
  4. Step 4: Simplify right side
    1,165.89x = 745,855.16
  5. Step 5: Solve for x
    x = 745,855.16/1,165.89
  6. Step 6: Final answer
    x = 639.73

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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.