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Finding the Fourth Proportional to 1,149.16, 1,723.74 and 379.72

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Solution

The fourth proportional to 1,149.16, 1,723.74 and 379.72 is: 569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.16 : 1,723.74 = 379.72 : x
  2. Step 2: Convert to fraction form
    1,149.16/1,723.74 = 379.72/x
  3. Step 3: Cross multiply
    1,149.16x = 1,723.74 × 379.72
  4. Step 4: Simplify right side
    1,149.16x = 654,538.55
  5. Step 5: Solve for x
    x = 654,538.55/1,149.16
  6. Step 6: Final answer
    x = 569.58

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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.