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Finding the Fourth Proportional to 946.73, 1,419.78 and 459.47

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Solution

The fourth proportional to 946.73, 1,419.78 and 459.47 is: 689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.73 : 1,419.78 = 459.47 : x
  2. Step 2: Convert to fraction form
    946.73/1,419.78 = 459.47/x
  3. Step 3: Cross multiply
    946.73x = 1,419.78 × 459.47
  4. Step 4: Simplify right side
    946.73x = 652,346.32
  5. Step 5: Solve for x
    x = 652,346.32/946.73
  6. Step 6: Final answer
    x = 689.05

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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.