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Finding the Fourth Proportional to 823.37, 1,135.82 and 626.54

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Solution

The fourth proportional to 823.37, 1,135.82 and 626.54 is: 864.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.37 : 1,135.82 = 626.54 : x
  2. Step 2: Convert to fraction form
    823.37/1,135.82 = 626.54/x
  3. Step 3: Cross multiply
    823.37x = 1,135.82 × 626.54
  4. Step 4: Simplify right side
    823.37x = 711,632.55
  5. Step 5: Solve for x
    x = 711,632.55/823.37
  6. Step 6: Final answer
    x = 864.30

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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.