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Finding the Fourth Proportional to 403.47, 605.30 and 114.91

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Solution

The fourth proportional to 403.47, 605.30 and 114.91 is: 172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.47 : 605.30 = 114.91 : x
  2. Step 2: Convert to fraction form
    403.47/605.30 = 114.91/x
  3. Step 3: Cross multiply
    403.47x = 605.30 × 114.91
  4. Step 4: Simplify right side
    403.47x = 69,555.02
  5. Step 5: Solve for x
    x = 69,555.02/403.47
  6. Step 6: Final answer
    x = 172.39

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.