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Finding the Fourth Proportional to 1,245.54, 1,714.77 and 1,079.22

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Solution

The fourth proportional to 1,245.54, 1,714.77 and 1,079.22 is: 1,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.54 : 1,714.77 = 1,079.22 : x
  2. Step 2: Convert to fraction form
    1,245.54/1,714.77 = 1,079.22/x
  3. Step 3: Cross multiply
    1,245.54x = 1,714.77 × 1,079.22
  4. Step 4: Simplify right side
    1,245.54x = 1,850,614.08
  5. Step 5: Solve for x
    x = 1,850,614.08/1,245.54
  6. Step 6: Final answer
    x = 1,485.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.