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Finding the Fourth Proportional to 837.94, 1,156.35 and 543.20

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Solution

The fourth proportional to 837.94, 1,156.35 and 543.20 is: 749.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.94 : 1,156.35 = 543.20 : x
  2. Step 2: Convert to fraction form
    837.94/1,156.35 = 543.20/x
  3. Step 3: Cross multiply
    837.94x = 1,156.35 × 543.20
  4. Step 4: Simplify right side
    837.94x = 628,129.32
  5. Step 5: Solve for x
    x = 628,129.32/837.94
  6. Step 6: Final answer
    x = 749.61

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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.