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Finding the Fourth Proportional to 1,278.33, 1,918.08 and 954.33

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Solution

The fourth proportional to 1,278.33, 1,918.08 and 954.33 is: 1,431.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.33 : 1,918.08 = 954.33 : x
  2. Step 2: Convert to fraction form
    1,278.33/1,918.08 = 954.33/x
  3. Step 3: Cross multiply
    1,278.33x = 1,918.08 × 954.33
  4. Step 4: Simplify right side
    1,278.33x = 1,830,481.29
  5. Step 5: Solve for x
    x = 1,830,481.29/1,278.33
  6. Step 6: Final answer
    x = 1,431.93

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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.