Home / 3,078.75-4,248.77-1,681.59

Finding the Fourth Proportional to 3,078.75, 4,248.77 and 1,681.59

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Solution

The fourth proportional to 3,078.75, 4,248.77 and 1,681.59 is: 2,320.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.75 : 4,248.77 = 1,681.59 : x
  2. Step 2: Convert to fraction form
    3,078.75/4,248.77 = 1,681.59/x
  3. Step 3: Cross multiply
    3,078.75x = 4,248.77 × 1,681.59
  4. Step 4: Simplify right side
    3,078.75x = 7,144,680.74
  5. Step 5: Solve for x
    x = 7,144,680.74/3,078.75
  6. Step 6: Final answer
    x = 2,320.64

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Half scale
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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.