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Finding the Fourth Proportional to 810.61, 1,216.06 and 481.82

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Solution

The fourth proportional to 810.61, 1,216.06 and 481.82 is: 722.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.61 : 1,216.06 = 481.82 : x
  2. Step 2: Convert to fraction form
    810.61/1,216.06 = 481.82/x
  3. Step 3: Cross multiply
    810.61x = 1,216.06 × 481.82
  4. Step 4: Simplify right side
    810.61x = 585,927.72
  5. Step 5: Solve for x
    x = 585,927.72/810.61
  6. Step 6: Final answer
    x = 722.82

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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.