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Finding the Fourth Proportional to 1,886.97, 2,829.75 and 654.09

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Solution

The fourth proportional to 1,886.97, 2,829.75 and 654.09 is: 980.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.97 : 2,829.75 = 654.09 : x
  2. Step 2: Convert to fraction form
    1,886.97/2,829.75 = 654.09/x
  3. Step 3: Cross multiply
    1,886.97x = 2,829.75 × 654.09
  4. Step 4: Simplify right side
    1,886.97x = 1,850,911.18
  5. Step 5: Solve for x
    x = 1,850,911.18/1,886.97
  6. Step 6: Final answer
    x = 980.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.