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Finding the Fourth Proportional to 946.15, 1,418.62 and 398.05

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Solution

The fourth proportional to 946.15, 1,418.62 and 398.05 is: 596.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.15 : 1,418.62 = 398.05 : x
  2. Step 2: Convert to fraction form
    946.15/1,418.62 = 398.05/x
  3. Step 3: Cross multiply
    946.15x = 1,418.62 × 398.05
  4. Step 4: Simplify right side
    946.15x = 564,681.69
  5. Step 5: Solve for x
    x = 564,681.69/946.15
  6. Step 6: Final answer
    x = 596.82

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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.