Home / 3,078.36-4,248.12-1,681.12

Finding the Fourth Proportional to 3,078.36, 4,248.12 and 1,681.12

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Solution

The fourth proportional to 3,078.36, 4,248.12 and 1,681.12 is: 2,319.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.36 : 4,248.12 = 1,681.12 : x
  2. Step 2: Convert to fraction form
    3,078.36/4,248.12 = 1,681.12/x
  3. Step 3: Cross multiply
    3,078.36x = 4,248.12 × 1,681.12
  4. Step 4: Simplify right side
    3,078.36x = 7,141,599.49
  5. Step 5: Solve for x
    x = 7,141,599.49/3,078.36
  6. Step 6: Final answer
    x = 2,319.94

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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.