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Finding the Fourth Proportional to 399.08, 598.30 and 277

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Solution

The fourth proportional to 399.08, 598.30 and 277 is: 415.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.08 : 598.30 = 277 : x
  2. Step 2: Convert to fraction form
    399.08/598.30 = 277/x
  3. Step 3: Cross multiply
    399.08x = 598.30 × 277
  4. Step 4: Simplify right side
    399.08x = 165,729.10
  5. Step 5: Solve for x
    x = 165,729.10/399.08
  6. Step 6: Final answer
    x = 415.28

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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.