Home / 1,809.29-2,495.27-1,390.65

Finding the Fourth Proportional to 1,809.29, 2,495.27 and 1,390.65

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Solution

The fourth proportional to 1,809.29, 2,495.27 and 1,390.65 is: 1,917.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.29 : 2,495.27 = 1,390.65 : x
  2. Step 2: Convert to fraction form
    1,809.29/2,495.27 = 1,390.65/x
  3. Step 3: Cross multiply
    1,809.29x = 2,495.27 × 1,390.65
  4. Step 4: Simplify right side
    1,809.29x = 3,470,050.70
  5. Step 5: Solve for x
    x = 3,470,050.70/1,809.29
  6. Step 6: Final answer
    x = 1,917.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.