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Finding the Fourth Proportional to 1,305.63, 1,958.04 and 646.83

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Solution

The fourth proportional to 1,305.63, 1,958.04 and 646.83 is: 970.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.63 : 1,958.04 = 646.83 : x
  2. Step 2: Convert to fraction form
    1,305.63/1,958.04 = 646.83/x
  3. Step 3: Cross multiply
    1,305.63x = 1,958.04 × 646.83
  4. Step 4: Simplify right side
    1,305.63x = 1,266,519.01
  5. Step 5: Solve for x
    x = 1,266,519.01/1,305.63
  6. Step 6: Final answer
    x = 970.04

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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.