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Finding the Fourth Proportional to 2,386.88, 3,293.88 and 1,392.08

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Solution

The fourth proportional to 2,386.88, 3,293.88 and 1,392.08 is: 1,921.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.88 : 3,293.88 = 1,392.08 : x
  2. Step 2: Convert to fraction form
    2,386.88/3,293.88 = 1,392.08/x
  3. Step 3: Cross multiply
    2,386.88x = 3,293.88 × 1,392.08
  4. Step 4: Simplify right side
    2,386.88x = 4,585,344.47
  5. Step 5: Solve for x
    x = 4,585,344.47/2,386.88
  6. Step 6: Final answer
    x = 1,921.06

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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.