Home / 3,078.46-4,248.30-1,681.21

Finding the Fourth Proportional to 3,078.46, 4,248.30 and 1,681.21

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Solution

The fourth proportional to 3,078.46, 4,248.30 and 1,681.21 is: 2,320.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.46 : 4,248.30 = 1,681.21 : x
  2. Step 2: Convert to fraction form
    3,078.46/4,248.30 = 1,681.21/x
  3. Step 3: Cross multiply
    3,078.46x = 4,248.30 × 1,681.21
  4. Step 4: Simplify right side
    3,078.46x = 7,142,284.44
  5. Step 5: Solve for x
    x = 7,142,284.44/3,078.46
  6. Step 6: Final answer
    x = 2,320.08

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Find fourth proportional to 3,079.46, 4,249.68 and 1,682.21
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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.