Home / 1,242.96-1,866.60-1,145.28

Finding the Fourth Proportional to 1,242.96, 1,866.60 and 1,145.28

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Solution

The fourth proportional to 1,242.96, 1,866.60 and 1,145.28 is: 1,719.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.96 : 1,866.60 = 1,145.28 : x
  2. Step 2: Convert to fraction form
    1,242.96/1,866.60 = 1,145.28/x
  3. Step 3: Cross multiply
    1,242.96x = 1,866.60 × 1,145.28
  4. Step 4: Simplify right side
    1,242.96x = 2,137,779.65
  5. Step 5: Solve for x
    x = 2,137,779.65/1,242.96
  6. Step 6: Final answer
    x = 1,719.91

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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.