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Finding the Fourth Proportional to 3,464, 4,780.78 and 1,971.64

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Solution

The fourth proportional to 3,464, 4,780.78 and 1,971.64 is: 2,721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,464 : 4,780.78 = 1,971.64 : x
  2. Step 2: Convert to fraction form
    3,464/4,780.78 = 1,971.64/x
  3. Step 3: Cross multiply
    3,464x = 4,780.78 × 1,971.64
  4. Step 4: Simplify right side
    3,464x = 9,425,977.08
  5. Step 5: Solve for x
    x = 9,425,977.08/3,464
  6. Step 6: Final answer
    x = 2,721.13

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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.