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Finding the Fourth Proportional to 1,654.85, 2,283.62 and 908.78

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Solution

The fourth proportional to 1,654.85, 2,283.62 and 908.78 is: 1,254.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,654.85 : 2,283.62 = 908.78 : x
  2. Step 2: Convert to fraction form
    1,654.85/2,283.62 = 908.78/x
  3. Step 3: Cross multiply
    1,654.85x = 2,283.62 × 908.78
  4. Step 4: Simplify right side
    1,654.85x = 2,075,292.22
  5. Step 5: Solve for x
    x = 2,075,292.22/1,654.85
  6. Step 6: Final answer
    x = 1,254.06

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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.