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Finding the Fourth Proportional to 491.04, 677.66 and 304.55

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Solution

The fourth proportional to 491.04, 677.66 and 304.55 is: 420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.04 : 677.66 = 304.55 : x
  2. Step 2: Convert to fraction form
    491.04/677.66 = 304.55/x
  3. Step 3: Cross multiply
    491.04x = 677.66 × 304.55
  4. Step 4: Simplify right side
    491.04x = 206,376.44
  5. Step 5: Solve for x
    x = 206,376.44/491.04
  6. Step 6: Final answer
    x = 420.28

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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.