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Finding the Fourth Proportional to 443.07, 611.36 and 253.98

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Solution

The fourth proportional to 443.07, 611.36 and 253.98 is: 350.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.07 : 611.36 = 253.98 : x
  2. Step 2: Convert to fraction form
    443.07/611.36 = 253.98/x
  3. Step 3: Cross multiply
    443.07x = 611.36 × 253.98
  4. Step 4: Simplify right side
    443.07x = 155,273.85
  5. Step 5: Solve for x
    x = 155,273.85/443.07
  6. Step 6: Final answer
    x = 350.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.