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Finding the Fourth Proportional to 399.16, 549.34 and 336.25

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Solution

The fourth proportional to 399.16, 549.34 and 336.25 is: 462.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.16 : 549.34 = 336.25 : x
  2. Step 2: Convert to fraction form
    399.16/549.34 = 336.25/x
  3. Step 3: Cross multiply
    399.16x = 549.34 × 336.25
  4. Step 4: Simplify right side
    399.16x = 184,715.58
  5. Step 5: Solve for x
    x = 184,715.58/399.16
  6. Step 6: Final answer
    x = 462.76

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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.