Home / 1,210.26-1,815.33-388.59

Finding the Fourth Proportional to 1,210.26, 1,815.33 and 388.59

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Solution

The fourth proportional to 1,210.26, 1,815.33 and 388.59 is: 582.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.26 : 1,815.33 = 388.59 : x
  2. Step 2: Convert to fraction form
    1,210.26/1,815.33 = 388.59/x
  3. Step 3: Cross multiply
    1,210.26x = 1,815.33 × 388.59
  4. Step 4: Simplify right side
    1,210.26x = 705,419.08
  5. Step 5: Solve for x
    x = 705,419.08/1,210.26
  6. Step 6: Final answer
    x = 582.87

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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.