Home / 1,786.74-2,465.28-1,078.40

Finding the Fourth Proportional to 1,786.74, 2,465.28 and 1,078.40

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Solution

The fourth proportional to 1,786.74, 2,465.28 and 1,078.40 is: 1,487.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.74 : 2,465.28 = 1,078.40 : x
  2. Step 2: Convert to fraction form
    1,786.74/2,465.28 = 1,078.40/x
  3. Step 3: Cross multiply
    1,786.74x = 2,465.28 × 1,078.40
  4. Step 4: Simplify right side
    1,786.74x = 2,658,557.95
  5. Step 5: Solve for x
    x = 2,658,557.95/1,786.74
  6. Step 6: Final answer
    x = 1,487.94

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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.