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Finding the Fourth Proportional to 2,390.96, 3,299.64 and 1,343

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Solution

The fourth proportional to 2,390.96, 3,299.64 and 1,343 is: 1,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.96 : 3,299.64 = 1,343 : x
  2. Step 2: Convert to fraction form
    2,390.96/3,299.64 = 1,343/x
  3. Step 3: Cross multiply
    2,390.96x = 3,299.64 × 1,343
  4. Step 4: Simplify right side
    2,390.96x = 4,431,416.52
  5. Step 5: Solve for x
    x = 4,431,416.52/2,390.96
  6. Step 6: Final answer
    x = 1,853.40

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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.