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Finding the Fourth Proportional to 842.76, 1,161 and 580.32

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Solution

The fourth proportional to 842.76, 1,161 and 580.32 is: 799.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.76 : 1,161 = 580.32 : x
  2. Step 2: Convert to fraction form
    842.76/1,161 = 580.32/x
  3. Step 3: Cross multiply
    842.76x = 1,161 × 580.32
  4. Step 4: Simplify right side
    842.76x = 673,751.52
  5. Step 5: Solve for x
    x = 673,751.52/842.76
  6. Step 6: Final answer
    x = 799.46

Related Problems

Find fourth proportional to 421.38, 580.50 and 290.16
Half scale
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Double scale
Find fourth proportional to 843.76, 1,162.38 and 581.32
Similar ratio
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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.