Home / 1,490.81-2,236.75-1,218.65

Finding the Fourth Proportional to 1,490.81, 2,236.75 and 1,218.65

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Solution

The fourth proportional to 1,490.81, 2,236.75 and 1,218.65 is: 1,828.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.81 : 2,236.75 = 1,218.65 : x
  2. Step 2: Convert to fraction form
    1,490.81/2,236.75 = 1,218.65/x
  3. Step 3: Cross multiply
    1,490.81x = 2,236.75 × 1,218.65
  4. Step 4: Simplify right side
    1,490.81x = 2,725,801.16
  5. Step 5: Solve for x
    x = 2,725,801.16/1,490.81
  6. Step 6: Final answer
    x = 1,828.41

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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.