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Finding the Fourth Proportional to 948.27, 1,308.38 and 637.77

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Solution

The fourth proportional to 948.27, 1,308.38 and 637.77 is: 879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.27 : 1,308.38 = 637.77 : x
  2. Step 2: Convert to fraction form
    948.27/1,308.38 = 637.77/x
  3. Step 3: Cross multiply
    948.27x = 1,308.38 × 637.77
  4. Step 4: Simplify right side
    948.27x = 834,442.32
  5. Step 5: Solve for x
    x = 834,442.32/948.27
  6. Step 6: Final answer
    x = 879.96

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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.