Home / 2,078.19-2,868.28-1,239.32

Finding the Fourth Proportional to 2,078.19, 2,868.28 and 1,239.32

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Solution

The fourth proportional to 2,078.19, 2,868.28 and 1,239.32 is: 1,710.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.19 : 2,868.28 = 1,239.32 : x
  2. Step 2: Convert to fraction form
    2,078.19/2,868.28 = 1,239.32/x
  3. Step 3: Cross multiply
    2,078.19x = 2,868.28 × 1,239.32
  4. Step 4: Simplify right side
    2,078.19x = 3,554,720.84
  5. Step 5: Solve for x
    x = 3,554,720.84/2,078.19
  6. Step 6: Final answer
    x = 1,710.49

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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.