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Finding the Fourth Proportional to 950.72, 1,311 and 656.44

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Solution

The fourth proportional to 950.72, 1,311 and 656.44 is: 905.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.72 : 1,311 = 656.44 : x
  2. Step 2: Convert to fraction form
    950.72/1,311 = 656.44/x
  3. Step 3: Cross multiply
    950.72x = 1,311 × 656.44
  4. Step 4: Simplify right side
    950.72x = 860,592.84
  5. Step 5: Solve for x
    x = 860,592.84/950.72
  6. Step 6: Final answer
    x = 905.20

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1.5x scale

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.