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Finding the Fourth Proportional to 1,113.96, 1,670.44 and 344.28

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Solution

The fourth proportional to 1,113.96, 1,670.44 and 344.28 is: 516.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.96 : 1,670.44 = 344.28 : x
  2. Step 2: Convert to fraction form
    1,113.96/1,670.44 = 344.28/x
  3. Step 3: Cross multiply
    1,113.96x = 1,670.44 × 344.28
  4. Step 4: Simplify right side
    1,113.96x = 575,099.08
  5. Step 5: Solve for x
    x = 575,099.08/1,113.96
  6. Step 6: Final answer
    x = 516.27

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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.