Home / 3,078.72-4,248.66-1,681.46

Finding the Fourth Proportional to 3,078.72, 4,248.66 and 1,681.46

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Solution

The fourth proportional to 3,078.72, 4,248.66 and 1,681.46 is: 2,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.72 : 4,248.66 = 1,681.46 : x
  2. Step 2: Convert to fraction form
    3,078.72/4,248.66 = 1,681.46/x
  3. Step 3: Cross multiply
    3,078.72x = 4,248.66 × 1,681.46
  4. Step 4: Simplify right side
    3,078.72x = 7,143,951.84
  5. Step 5: Solve for x
    x = 7,143,951.84/3,078.72
  6. Step 6: Final answer
    x = 2,320.43

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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.