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Finding the Fourth Proportional to 946.46, 1,419.88 and 459.24

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Solution

The fourth proportional to 946.46, 1,419.88 and 459.24 is: 688.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.46 : 1,419.88 = 459.24 : x
  2. Step 2: Convert to fraction form
    946.46/1,419.88 = 459.24/x
  3. Step 3: Cross multiply
    946.46x = 1,419.88 × 459.24
  4. Step 4: Simplify right side
    946.46x = 652,065.69
  5. Step 5: Solve for x
    x = 652,065.69/946.46
  6. Step 6: Final answer
    x = 688.95

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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.