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Finding the Fourth Proportional to 1,601.64, 2,403 and 779.76

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Solution

The fourth proportional to 1,601.64, 2,403 and 779.76 is: 1,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,601.64 : 2,403 = 779.76 : x
  2. Step 2: Convert to fraction form
    1,601.64/2,403 = 779.76/x
  3. Step 3: Cross multiply
    1,601.64x = 2,403 × 779.76
  4. Step 4: Simplify right side
    1,601.64x = 1,873,763.28
  5. Step 5: Solve for x
    x = 1,873,763.28/1,601.64
  6. Step 6: Final answer
    x = 1,169.90

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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.