Home / 1,779.45-2,669.15-1,389.78

Finding the Fourth Proportional to 1,779.45, 2,669.15 and 1,389.78

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Solution

The fourth proportional to 1,779.45, 2,669.15 and 1,389.78 is: 2,084.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.45 : 2,669.15 = 1,389.78 : x
  2. Step 2: Convert to fraction form
    1,779.45/2,669.15 = 1,389.78/x
  3. Step 3: Cross multiply
    1,779.45x = 2,669.15 × 1,389.78
  4. Step 4: Simplify right side
    1,779.45x = 3,709,524.34
  5. Step 5: Solve for x
    x = 3,709,524.34/1,779.45
  6. Step 6: Final answer
    x = 2,084.65

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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.