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Finding the Fourth Proportional to 1,779.25, 2,665.30 and 887.09

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Solution

The fourth proportional to 1,779.25, 2,665.30 and 887.09 is: 1,328.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.25 : 2,665.30 = 887.09 : x
  2. Step 2: Convert to fraction form
    1,779.25/2,665.30 = 887.09/x
  3. Step 3: Cross multiply
    1,779.25x = 2,665.30 × 887.09
  4. Step 4: Simplify right side
    1,779.25x = 2,364,347.65
  5. Step 5: Solve for x
    x = 2,364,347.65/1,779.25
  6. Step 6: Final answer
    x = 1,328.85

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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.