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Finding the Fourth Proportional to 1,105.24, 1,657.91 and 556.77

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Solution

The fourth proportional to 1,105.24, 1,657.91 and 556.77 is: 835.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.24 : 1,657.91 = 556.77 : x
  2. Step 2: Convert to fraction form
    1,105.24/1,657.91 = 556.77/x
  3. Step 3: Cross multiply
    1,105.24x = 1,657.91 × 556.77
  4. Step 4: Simplify right side
    1,105.24x = 923,074.55
  5. Step 5: Solve for x
    x = 923,074.55/1,105.24
  6. Step 6: Final answer
    x = 835.18

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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.