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Finding the Fourth Proportional to 1,375.57, 2,064.21 and 543.34

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Solution

The fourth proportional to 1,375.57, 2,064.21 and 543.34 is: 815.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.57 : 2,064.21 = 543.34 : x
  2. Step 2: Convert to fraction form
    1,375.57/2,064.21 = 543.34/x
  3. Step 3: Cross multiply
    1,375.57x = 2,064.21 × 543.34
  4. Step 4: Simplify right side
    1,375.57x = 1,121,567.86
  5. Step 5: Solve for x
    x = 1,121,567.86/1,375.57
  6. Step 6: Final answer
    x = 815.35

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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.