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Finding the Fourth Proportional to 825.51, 1,139.16 and 452.42

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Solution

The fourth proportional to 825.51, 1,139.16 and 452.42 is: 624.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.51 : 1,139.16 = 452.42 : x
  2. Step 2: Convert to fraction form
    825.51/1,139.16 = 452.42/x
  3. Step 3: Cross multiply
    825.51x = 1,139.16 × 452.42
  4. Step 4: Simplify right side
    825.51x = 515,378.77
  5. Step 5: Solve for x
    x = 515,378.77/825.51
  6. Step 6: Final answer
    x = 624.32

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Double scale
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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.