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Finding the Fourth Proportional to 948.08, 1,422.36 and 289.94

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Solution

The fourth proportional to 948.08, 1,422.36 and 289.94 is: 434.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.08 : 1,422.36 = 289.94 : x
  2. Step 2: Convert to fraction form
    948.08/1,422.36 = 289.94/x
  3. Step 3: Cross multiply
    948.08x = 1,422.36 × 289.94
  4. Step 4: Simplify right side
    948.08x = 412,391.95
  5. Step 5: Solve for x
    x = 412,391.95/948.08
  6. Step 6: Final answer
    x = 434.98

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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.