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Finding the Fourth Proportional to 1,779.79, 2,669.68 and 855.13

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Solution

The fourth proportional to 1,779.79, 2,669.68 and 855.13 is: 1,282.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.79 : 2,669.68 = 855.13 : x
  2. Step 2: Convert to fraction form
    1,779.79/2,669.68 = 855.13/x
  3. Step 3: Cross multiply
    1,779.79x = 2,669.68 × 855.13
  4. Step 4: Simplify right side
    1,779.79x = 2,282,917.85
  5. Step 5: Solve for x
    x = 2,282,917.85/1,779.79
  6. Step 6: Final answer
    x = 1,282.69

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1.5x scale

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.