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Finding the Fourth Proportional to 845.93, 1,262.80 and 722

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Solution

The fourth proportional to 845.93, 1,262.80 and 722 is: 1,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.93 : 1,262.80 = 722 : x
  2. Step 2: Convert to fraction form
    845.93/1,262.80 = 722/x
  3. Step 3: Cross multiply
    845.93x = 1,262.80 × 722
  4. Step 4: Simplify right side
    845.93x = 911,741.60
  5. Step 5: Solve for x
    x = 911,741.60/845.93
  6. Step 6: Final answer
    x = 1,077.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.