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Finding the Fourth Proportional to 948.05, 1,308.26 and 555.29

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Solution

The fourth proportional to 948.05, 1,308.26 and 555.29 is: 766.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.05 : 1,308.26 = 555.29 : x
  2. Step 2: Convert to fraction form
    948.05/1,308.26 = 555.29/x
  3. Step 3: Cross multiply
    948.05x = 1,308.26 × 555.29
  4. Step 4: Simplify right side
    948.05x = 726,458.54
  5. Step 5: Solve for x
    x = 726,458.54/948.05
  6. Step 6: Final answer
    x = 766.27

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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.