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Finding the Fourth Proportional to 946.55, 1,419.60 and 426.26

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Solution

The fourth proportional to 946.55, 1,419.60 and 426.26 is: 639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.55 : 1,419.60 = 426.26 : x
  2. Step 2: Convert to fraction form
    946.55/1,419.60 = 426.26/x
  3. Step 3: Cross multiply
    946.55x = 1,419.60 × 426.26
  4. Step 4: Simplify right side
    946.55x = 605,111.60
  5. Step 5: Solve for x
    x = 605,111.60/946.55
  6. Step 6: Final answer
    x = 639.28

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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.