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Finding the Fourth Proportional to 3,579.32, 5,368.26 and 1,113.74

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Solution

The fourth proportional to 3,579.32, 5,368.26 and 1,113.74 is: 1,670.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.32 : 5,368.26 = 1,113.74 : x
  2. Step 2: Convert to fraction form
    3,579.32/5,368.26 = 1,113.74/x
  3. Step 3: Cross multiply
    3,579.32x = 5,368.26 × 1,113.74
  4. Step 4: Simplify right side
    3,579.32x = 5,978,845.89
  5. Step 5: Solve for x
    x = 5,978,845.89/3,579.32
  6. Step 6: Final answer
    x = 1,670.39

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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.