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Finding the Fourth Proportional to 637.05, 955.46 and 312.21

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Solution

The fourth proportional to 637.05, 955.46 and 312.21 is: 468.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.05 : 955.46 = 312.21 : x
  2. Step 2: Convert to fraction form
    637.05/955.46 = 312.21/x
  3. Step 3: Cross multiply
    637.05x = 955.46 × 312.21
  4. Step 4: Simplify right side
    637.05x = 298,302.61
  5. Step 5: Solve for x
    x = 298,302.61/637.05
  6. Step 6: Final answer
    x = 468.26

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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.