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Finding the Fourth Proportional to 953.55, 1,428.47 and 850.35

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Solution

The fourth proportional to 953.55, 1,428.47 and 850.35 is: 1,273.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.55 : 1,428.47 = 850.35 : x
  2. Step 2: Convert to fraction form
    953.55/1,428.47 = 850.35/x
  3. Step 3: Cross multiply
    953.55x = 1,428.47 × 850.35
  4. Step 4: Simplify right side
    953.55x = 1,214,695.21
  5. Step 5: Solve for x
    x = 1,214,695.21/953.55
  6. Step 6: Final answer
    x = 1,273.87

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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.