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Finding the Fourth Proportional to 1,779.34, 2,669.11 and 739.45

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Solution

The fourth proportional to 1,779.34, 2,669.11 and 739.45 is: 1,109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.34 : 2,669.11 = 739.45 : x
  2. Step 2: Convert to fraction form
    1,779.34/2,669.11 = 739.45/x
  3. Step 3: Cross multiply
    1,779.34x = 2,669.11 × 739.45
  4. Step 4: Simplify right side
    1,779.34x = 1,973,666.25
  5. Step 5: Solve for x
    x = 1,973,666.25/1,779.34
  6. Step 6: Final answer
    x = 1,109.21

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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.