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Finding the Fourth Proportional to 950.12, 1,311.30 and 557.08

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Solution

The fourth proportional to 950.12, 1,311.30 and 557.08 is: 768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.12 : 1,311.30 = 557.08 : x
  2. Step 2: Convert to fraction form
    950.12/1,311.30 = 557.08/x
  3. Step 3: Cross multiply
    950.12x = 1,311.30 × 557.08
  4. Step 4: Simplify right side
    950.12x = 730,499.00
  5. Step 5: Solve for x
    x = 730,499.00/950.12
  6. Step 6: Final answer
    x = 768.85

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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.