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Finding the Fourth Proportional to 417.30, 573.48 and 398.28

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Solution

The fourth proportional to 417.30, 573.48 and 398.28 is: 547.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.30 : 573.48 = 398.28 : x
  2. Step 2: Convert to fraction form
    417.30/573.48 = 398.28/x
  3. Step 3: Cross multiply
    417.30x = 573.48 × 398.28
  4. Step 4: Simplify right side
    417.30x = 228,405.61
  5. Step 5: Solve for x
    x = 228,405.61/417.30
  6. Step 6: Final answer
    x = 547.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.