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Finding the Fourth Proportional to 845.20, 1,166.94 and 648.36

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Solution

The fourth proportional to 845.20, 1,166.94 and 648.36 is: 895.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.20 : 1,166.94 = 648.36 : x
  2. Step 2: Convert to fraction form
    845.20/1,166.94 = 648.36/x
  3. Step 3: Cross multiply
    845.20x = 1,166.94 × 648.36
  4. Step 4: Simplify right side
    845.20x = 756,597.22
  5. Step 5: Solve for x
    x = 756,597.22/845.20
  6. Step 6: Final answer
    x = 895.17

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1.5x scale

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.