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Finding the Fourth Proportional to 1,764.83, 2,647.63 and 669.21

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Solution

The fourth proportional to 1,764.83, 2,647.63 and 669.21 is: 1,003.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.83 : 2,647.63 = 669.21 : x
  2. Step 2: Convert to fraction form
    1,764.83/2,647.63 = 669.21/x
  3. Step 3: Cross multiply
    1,764.83x = 2,647.63 × 669.21
  4. Step 4: Simplify right side
    1,764.83x = 1,771,807.23
  5. Step 5: Solve for x
    x = 1,771,807.23/1,764.83
  6. Step 6: Final answer
    x = 1,003.95

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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.