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Finding the Fourth Proportional to 845.81, 1,262.60 and 730.99

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Solution

The fourth proportional to 845.81, 1,262.60 and 730.99 is: 1,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.81 : 1,262.60 = 730.99 : x
  2. Step 2: Convert to fraction form
    845.81/1,262.60 = 730.99/x
  3. Step 3: Cross multiply
    845.81x = 1,262.60 × 730.99
  4. Step 4: Simplify right side
    845.81x = 922,947.97
  5. Step 5: Solve for x
    x = 922,947.97/845.81
  6. Step 6: Final answer
    x = 1,091.20

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1.5x scale

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.