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Finding the Fourth Proportional to 1,779.85, 2,659.65 and 1,332.22

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Solution

The fourth proportional to 1,779.85, 2,659.65 and 1,332.22 is: 1,990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.85 : 2,659.65 = 1,332.22 : x
  2. Step 2: Convert to fraction form
    1,779.85/2,659.65 = 1,332.22/x
  3. Step 3: Cross multiply
    1,779.85x = 2,659.65 × 1,332.22
  4. Step 4: Simplify right side
    1,779.85x = 3,543,232.26
  5. Step 5: Solve for x
    x = 3,543,232.26/1,779.85
  6. Step 6: Final answer
    x = 1,990.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.