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Finding the Fourth Proportional to 825.06, 1,138.38 and 589.62

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Solution

The fourth proportional to 825.06, 1,138.38 and 589.62 is: 813.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.06 : 1,138.38 = 589.62 : x
  2. Step 2: Convert to fraction form
    825.06/1,138.38 = 589.62/x
  3. Step 3: Cross multiply
    825.06x = 1,138.38 × 589.62
  4. Step 4: Simplify right side
    825.06x = 671,211.62
  5. Step 5: Solve for x
    x = 671,211.62/825.06
  6. Step 6: Final answer
    x = 813.53

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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.