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Finding the Fourth Proportional to 1,958.26, 2,937.38 and 642.93

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Solution

The fourth proportional to 1,958.26, 2,937.38 and 642.93 is: 964.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.26 : 2,937.38 = 642.93 : x
  2. Step 2: Convert to fraction form
    1,958.26/2,937.38 = 642.93/x
  3. Step 3: Cross multiply
    1,958.26x = 2,937.38 × 642.93
  4. Step 4: Simplify right side
    1,958.26x = 1,888,519.11
  5. Step 5: Solve for x
    x = 1,888,519.11/1,958.26
  6. Step 6: Final answer
    x = 964.39

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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.