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Finding the Fourth Proportional to 609.33, 841.26 and 422.76

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Solution

The fourth proportional to 609.33, 841.26 and 422.76 is: 583.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.33 : 841.26 = 422.76 : x
  2. Step 2: Convert to fraction form
    609.33/841.26 = 422.76/x
  3. Step 3: Cross multiply
    609.33x = 841.26 × 422.76
  4. Step 4: Simplify right side
    609.33x = 355,651.08
  5. Step 5: Solve for x
    x = 355,651.08/609.33
  6. Step 6: Final answer
    x = 583.68

Related Problems

Find fourth proportional to 304.67, 420.63 and 211.38
Half scale
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Double scale
Find fourth proportional to 610.33, 842.64 and 423.76
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.