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Finding the Fourth Proportional to 3,078.93, 4,248.96 and 1,681.68

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Solution

The fourth proportional to 3,078.93, 4,248.96 and 1,681.68 is: 2,320.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.93 : 4,248.96 = 1,681.68 : x
  2. Step 2: Convert to fraction form
    3,078.93/4,248.96 = 1,681.68/x
  3. Step 3: Cross multiply
    3,078.93x = 4,248.96 × 1,681.68
  4. Step 4: Simplify right side
    3,078.93x = 7,145,391.05
  5. Step 5: Solve for x
    x = 7,145,391.05/3,078.93
  6. Step 6: Final answer
    x = 2,320.74

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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.