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Finding the Fourth Proportional to 1,779.67, 2,669.61 and 547.09

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Solution

The fourth proportional to 1,779.67, 2,669.61 and 547.09 is: 820.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.67 : 2,669.61 = 547.09 : x
  2. Step 2: Convert to fraction form
    1,779.67/2,669.61 = 547.09/x
  3. Step 3: Cross multiply
    1,779.67x = 2,669.61 × 547.09
  4. Step 4: Simplify right side
    1,779.67x = 1,460,516.93
  5. Step 5: Solve for x
    x = 1,460,516.93/1,779.67
  6. Step 6: Final answer
    x = 820.67

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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.