Home / 1,618.64-2,429.40-1,293.20

Finding the Fourth Proportional to 1,618.64, 2,429.40 and 1,293.20

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Solution

The fourth proportional to 1,618.64, 2,429.40 and 1,293.20 is: 1,940.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.64 : 2,429.40 = 1,293.20 : x
  2. Step 2: Convert to fraction form
    1,618.64/2,429.40 = 1,293.20/x
  3. Step 3: Cross multiply
    1,618.64x = 2,429.40 × 1,293.20
  4. Step 4: Simplify right side
    1,618.64x = 3,141,700.08
  5. Step 5: Solve for x
    x = 3,141,700.08/1,618.64
  6. Step 6: Final answer
    x = 1,940.95

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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.