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Finding the Fourth Proportional to 3,558.74, 4,911.17 and 1,986.90

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Solution

The fourth proportional to 3,558.74, 4,911.17 and 1,986.90 is: 2,741.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,558.74 : 4,911.17 = 1,986.90 : x
  2. Step 2: Convert to fraction form
    3,558.74/4,911.17 = 1,986.90/x
  3. Step 3: Cross multiply
    3,558.74x = 4,911.17 × 1,986.90
  4. Step 4: Simplify right side
    3,558.74x = 9,758,003.67
  5. Step 5: Solve for x
    x = 9,758,003.67/3,558.74
  6. Step 6: Final answer
    x = 2,741.98

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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.