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Finding the Fourth Proportional to 890.68, 1,336.04 and 305.68

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Solution

The fourth proportional to 890.68, 1,336.04 and 305.68 is: 458.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.68 : 1,336.04 = 305.68 : x
  2. Step 2: Convert to fraction form
    890.68/1,336.04 = 305.68/x
  3. Step 3: Cross multiply
    890.68x = 1,336.04 × 305.68
  4. Step 4: Simplify right side
    890.68x = 408,404.97
  5. Step 5: Solve for x
    x = 408,404.97/890.68
  6. Step 6: Final answer
    x = 458.53

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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.