Home / 2,439.06-3,365.07-1,390.86

Finding the Fourth Proportional to 2,439.06, 3,365.07 and 1,390.86

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Solution

The fourth proportional to 2,439.06, 3,365.07 and 1,390.86 is: 1,918.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,439.06 : 3,365.07 = 1,390.86 : x
  2. Step 2: Convert to fraction form
    2,439.06/3,365.07 = 1,390.86/x
  3. Step 3: Cross multiply
    2,439.06x = 3,365.07 × 1,390.86
  4. Step 4: Simplify right side
    2,439.06x = 4,680,341.26
  5. Step 5: Solve for x
    x = 4,680,341.26/2,439.06
  6. Step 6: Final answer
    x = 1,918.91

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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.