Home / 1,678.92-2,313.54-1,386.24

Finding the Fourth Proportional to 1,678.92, 2,313.54 and 1,386.24

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Solution

The fourth proportional to 1,678.92, 2,313.54 and 1,386.24 is: 1,910.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.92 : 2,313.54 = 1,386.24 : x
  2. Step 2: Convert to fraction form
    1,678.92/2,313.54 = 1,386.24/x
  3. Step 3: Cross multiply
    1,678.92x = 2,313.54 × 1,386.24
  4. Step 4: Simplify right side
    1,678.92x = 3,207,121.69
  5. Step 5: Solve for x
    x = 3,207,121.69/1,678.92
  6. Step 6: Final answer
    x = 1,910.23

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1.5x scale

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.