Home / 1,779.32-2,669.59-668.90

Finding the Fourth Proportional to 1,779.32, 2,669.59 and 668.90

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Solution

The fourth proportional to 1,779.32, 2,669.59 and 668.90 is: 1,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.32 : 2,669.59 = 668.90 : x
  2. Step 2: Convert to fraction form
    1,779.32/2,669.59 = 668.90/x
  3. Step 3: Cross multiply
    1,779.32x = 2,669.59 × 668.90
  4. Step 4: Simplify right side
    1,779.32x = 1,785,688.75
  5. Step 5: Solve for x
    x = 1,785,688.75/1,779.32
  6. Step 6: Final answer
    x = 1,003.58

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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.