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Finding the Fourth Proportional to 3,561.74, 4,916.55 and 3,188.05

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Solution

The fourth proportional to 3,561.74, 4,916.55 and 3,188.05 is: 4,400.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.74 : 4,916.55 = 3,188.05 : x
  2. Step 2: Convert to fraction form
    3,561.74/4,916.55 = 3,188.05/x
  3. Step 3: Cross multiply
    3,561.74x = 4,916.55 × 3,188.05
  4. Step 4: Simplify right side
    3,561.74x = 15,674,182.64
  5. Step 5: Solve for x
    x = 15,674,182.64/3,561.74
  6. Step 6: Final answer
    x = 4,400.72

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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.