Home / 1,916.64-2,870.19-1,221.26

Finding the Fourth Proportional to 1,916.64, 2,870.19 and 1,221.26

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Solution

The fourth proportional to 1,916.64, 2,870.19 and 1,221.26 is: 1,828.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.64 : 2,870.19 = 1,221.26 : x
  2. Step 2: Convert to fraction form
    1,916.64/2,870.19 = 1,221.26/x
  3. Step 3: Cross multiply
    1,916.64x = 2,870.19 × 1,221.26
  4. Step 4: Simplify right side
    1,916.64x = 3,505,233.89
  5. Step 5: Solve for x
    x = 3,505,233.89/1,916.64
  6. Step 6: Final answer
    x = 1,828.84

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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.