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Finding the Fourth Proportional to 2,860.66, 3,948.06 and 1,681.84

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Solution

The fourth proportional to 2,860.66, 3,948.06 and 1,681.84 is: 2,321.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.66 : 3,948.06 = 1,681.84 : x
  2. Step 2: Convert to fraction form
    2,860.66/3,948.06 = 1,681.84/x
  3. Step 3: Cross multiply
    2,860.66x = 3,948.06 × 1,681.84
  4. Step 4: Simplify right side
    2,860.66x = 6,640,005.23
  5. Step 5: Solve for x
    x = 6,640,005.23/2,860.66
  6. Step 6: Final answer
    x = 2,321.14

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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.