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Finding the Fourth Proportional to 423.18, 637.26 and 369.72

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Solution

The fourth proportional to 423.18, 637.26 and 369.72 is: 556.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.18 : 637.26 = 369.72 : x
  2. Step 2: Convert to fraction form
    423.18/637.26 = 369.72/x
  3. Step 3: Cross multiply
    423.18x = 637.26 × 369.72
  4. Step 4: Simplify right side
    423.18x = 235,607.77
  5. Step 5: Solve for x
    x = 235,607.77/423.18
  6. Step 6: Final answer
    x = 556.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.