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Finding the Fourth Proportional to 399.08, 549.54 and 370.04

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Solution

The fourth proportional to 399.08, 549.54 and 370.04 is: 509.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.08 : 549.54 = 370.04 : x
  2. Step 2: Convert to fraction form
    399.08/549.54 = 370.04/x
  3. Step 3: Cross multiply
    399.08x = 549.54 × 370.04
  4. Step 4: Simplify right side
    399.08x = 203,351.78
  5. Step 5: Solve for x
    x = 203,351.78/399.08
  6. Step 6: Final answer
    x = 509.55

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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.