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Finding the Fourth Proportional to 418.02, 626.76 and 316.32

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Solution

The fourth proportional to 418.02, 626.76 and 316.32 is: 474.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.02 : 626.76 = 316.32 : x
  2. Step 2: Convert to fraction form
    418.02/626.76 = 316.32/x
  3. Step 3: Cross multiply
    418.02x = 626.76 × 316.32
  4. Step 4: Simplify right side
    418.02x = 198,256.72
  5. Step 5: Solve for x
    x = 198,256.72/418.02
  6. Step 6: Final answer
    x = 474.28

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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.