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Finding the Fourth Proportional to 637.55, 955.70 and 405.73

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Solution

The fourth proportional to 637.55, 955.70 and 405.73 is: 608.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.55 : 955.70 = 405.73 : x
  2. Step 2: Convert to fraction form
    637.55/955.70 = 405.73/x
  3. Step 3: Cross multiply
    637.55x = 955.70 × 405.73
  4. Step 4: Simplify right side
    637.55x = 387,756.16
  5. Step 5: Solve for x
    x = 387,756.16/637.55
  6. Step 6: Final answer
    x = 608.20

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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.