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Finding the Fourth Proportional to 2,340.79, 3,230.02 and 1,292.79

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Solution

The fourth proportional to 2,340.79, 3,230.02 and 1,292.79 is: 1,783.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,340.79 : 3,230.02 = 1,292.79 : x
  2. Step 2: Convert to fraction form
    2,340.79/3,230.02 = 1,292.79/x
  3. Step 3: Cross multiply
    2,340.79x = 3,230.02 × 1,292.79
  4. Step 4: Simplify right side
    2,340.79x = 4,175,731.09
  5. Step 5: Solve for x
    x = 4,175,731.09/2,340.79
  6. Step 6: Final answer
    x = 1,783.90

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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.