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Finding the Fourth Proportional to 946.92, 1,418.98 and 459.42

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Solution

The fourth proportional to 946.92, 1,418.98 and 459.42 is: 688.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.92 : 1,418.98 = 459.42 : x
  2. Step 2: Convert to fraction form
    946.92/1,418.98 = 459.42/x
  3. Step 3: Cross multiply
    946.92x = 1,418.98 × 459.42
  4. Step 4: Simplify right side
    946.92x = 651,907.79
  5. Step 5: Solve for x
    x = 651,907.79/946.92
  6. Step 6: Final answer
    x = 688.45

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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.