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Finding the Fourth Proportional to 946.34, 1,419.24 and 426.05

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Solution

The fourth proportional to 946.34, 1,419.24 and 426.05 is: 638.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.34 : 1,419.24 = 426.05 : x
  2. Step 2: Convert to fraction form
    946.34/1,419.24 = 426.05/x
  3. Step 3: Cross multiply
    946.34x = 1,419.24 × 426.05
  4. Step 4: Simplify right side
    946.34x = 604,660.11
  5. Step 5: Solve for x
    x = 604,660.11/946.34
  6. Step 6: Final answer
    x = 638.95

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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.