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Finding the Fourth Proportional to 948.09, 1,308.06 and 554.97

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Solution

The fourth proportional to 948.09, 1,308.06 and 554.97 is: 765.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.09 : 1,308.06 = 554.97 : x
  2. Step 2: Convert to fraction form
    948.09/1,308.06 = 554.97/x
  3. Step 3: Cross multiply
    948.09x = 1,308.06 × 554.97
  4. Step 4: Simplify right side
    948.09x = 725,934.06
  5. Step 5: Solve for x
    x = 725,934.06/948.09
  6. Step 6: Final answer
    x = 765.68

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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.