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Finding the Fourth Proportional to 607.18, 837.64 and 396.99

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Solution

The fourth proportional to 607.18, 837.64 and 396.99 is: 547.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.18 : 837.64 = 396.99 : x
  2. Step 2: Convert to fraction form
    607.18/837.64 = 396.99/x
  3. Step 3: Cross multiply
    607.18x = 837.64 × 396.99
  4. Step 4: Simplify right side
    607.18x = 332,530.52
  5. Step 5: Solve for x
    x = 332,530.52/607.18
  6. Step 6: Final answer
    x = 547.67

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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.