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Finding the Fourth Proportional to 3,465.78, 4,782.78 and 1,893.88

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Solution

The fourth proportional to 3,465.78, 4,782.78 and 1,893.88 is: 2,613.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,465.78 : 4,782.78 = 1,893.88 : x
  2. Step 2: Convert to fraction form
    3,465.78/4,782.78 = 1,893.88/x
  3. Step 3: Cross multiply
    3,465.78x = 4,782.78 × 1,893.88
  4. Step 4: Simplify right side
    3,465.78x = 9,057,987.47
  5. Step 5: Solve for x
    x = 9,057,987.47/3,465.78
  6. Step 6: Final answer
    x = 2,613.55

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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.