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Finding the Fourth Proportional to 890.28, 1,334.97 and 305.19

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Solution

The fourth proportional to 890.28, 1,334.97 and 305.19 is: 457.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.28 : 1,334.97 = 305.19 : x
  2. Step 2: Convert to fraction form
    890.28/1,334.97 = 305.19/x
  3. Step 3: Cross multiply
    890.28x = 1,334.97 × 305.19
  4. Step 4: Simplify right side
    890.28x = 407,419.49
  5. Step 5: Solve for x
    x = 407,419.49/890.28
  6. Step 6: Final answer
    x = 457.63

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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.