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Finding the Fourth Proportional to 946.62, 1,419.93 and 459.72

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Solution

The fourth proportional to 946.62, 1,419.93 and 459.72 is: 689.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.62 : 1,419.93 = 459.72 : x
  2. Step 2: Convert to fraction form
    946.62/1,419.93 = 459.72/x
  3. Step 3: Cross multiply
    946.62x = 1,419.93 × 459.72
  4. Step 4: Simplify right side
    946.62x = 652,770.22
  5. Step 5: Solve for x
    x = 652,770.22/946.62
  6. Step 6: Final answer
    x = 689.58

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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.