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Finding the Fourth Proportional to 637.40, 955.20 and 444.80

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Solution

The fourth proportional to 637.40, 955.20 and 444.80 is: 666.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.40 : 955.20 = 444.80 : x
  2. Step 2: Convert to fraction form
    637.40/955.20 = 444.80/x
  3. Step 3: Cross multiply
    637.40x = 955.20 × 444.80
  4. Step 4: Simplify right side
    637.40x = 424,872.96
  5. Step 5: Solve for x
    x = 424,872.96/637.40
  6. Step 6: Final answer
    x = 666.57

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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.