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Finding the Fourth Proportional to 890.46, 1,334.93 and 396.95

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Solution

The fourth proportional to 890.46, 1,334.93 and 396.95 is: 595.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.46 : 1,334.93 = 396.95 : x
  2. Step 2: Convert to fraction form
    890.46/1,334.93 = 396.95/x
  3. Step 3: Cross multiply
    890.46x = 1,334.93 × 396.95
  4. Step 4: Simplify right side
    890.46x = 529,891.80
  5. Step 5: Solve for x
    x = 529,891.80/890.46
  6. Step 6: Final answer
    x = 595.08

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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.