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Finding the Fourth Proportional to 1,165.24, 1,747.86 and 395.74

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Solution

The fourth proportional to 1,165.24, 1,747.86 and 395.74 is: 593.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.24 : 1,747.86 = 395.74 : x
  2. Step 2: Convert to fraction form
    1,165.24/1,747.86 = 395.74/x
  3. Step 3: Cross multiply
    1,165.24x = 1,747.86 × 395.74
  4. Step 4: Simplify right side
    1,165.24x = 691,698.12
  5. Step 5: Solve for x
    x = 691,698.12/1,165.24
  6. Step 6: Final answer
    x = 593.61

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1.5x scale

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.