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Finding the Fourth Proportional to 1,964.45, 2,945.75 and 577.43

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Solution

The fourth proportional to 1,964.45, 2,945.75 and 577.43 is: 865.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.45 : 2,945.75 = 577.43 : x
  2. Step 2: Convert to fraction form
    1,964.45/2,945.75 = 577.43/x
  3. Step 3: Cross multiply
    1,964.45x = 2,945.75 × 577.43
  4. Step 4: Simplify right side
    1,964.45x = 1,700,964.42
  5. Step 5: Solve for x
    x = 1,700,964.42/1,964.45
  6. Step 6: Final answer
    x = 865.87

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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.