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Finding the Fourth Proportional to 1,779.75, 2,669.66 and 739.45

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Solution

The fourth proportional to 1,779.75, 2,669.66 and 739.45 is: 1,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.75 : 2,669.66 = 739.45 : x
  2. Step 2: Convert to fraction form
    1,779.75/2,669.66 = 739.45/x
  3. Step 3: Cross multiply
    1,779.75x = 2,669.66 × 739.45
  4. Step 4: Simplify right side
    1,779.75x = 1,974,090.01
  5. Step 5: Solve for x
    x = 1,974,090.01/1,779.75
  6. Step 6: Final answer
    x = 1,109.20

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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.