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Finding the Fourth Proportional to 948.73, 1,423.49 and 421.37

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Solution

The fourth proportional to 948.73, 1,423.49 and 421.37 is: 632.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.73 : 1,423.49 = 421.37 : x
  2. Step 2: Convert to fraction form
    948.73/1,423.49 = 421.37/x
  3. Step 3: Cross multiply
    948.73x = 1,423.49 × 421.37
  4. Step 4: Simplify right side
    948.73x = 599,815.98
  5. Step 5: Solve for x
    x = 599,815.98/948.73
  6. Step 6: Final answer
    x = 632.23

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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.