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Finding the Fourth Proportional to 946.10, 1,418.79 and 459.38

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Solution

The fourth proportional to 946.10, 1,418.79 and 459.38 is: 688.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.10 : 1,418.79 = 459.38 : x
  2. Step 2: Convert to fraction form
    946.10/1,418.79 = 459.38/x
  3. Step 3: Cross multiply
    946.10x = 1,418.79 × 459.38
  4. Step 4: Simplify right side
    946.10x = 651,763.75
  5. Step 5: Solve for x
    x = 651,763.75/946.10
  6. Step 6: Final answer
    x = 688.90

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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.