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Finding the Fourth Proportional to 622.11, 858.26 and 401.19

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Solution

The fourth proportional to 622.11, 858.26 and 401.19 is: 553.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.11 : 858.26 = 401.19 : x
  2. Step 2: Convert to fraction form
    622.11/858.26 = 401.19/x
  3. Step 3: Cross multiply
    622.11x = 858.26 × 401.19
  4. Step 4: Simplify right side
    622.11x = 344,325.33
  5. Step 5: Solve for x
    x = 344,325.33/622.11
  6. Step 6: Final answer
    x = 553.48

Related Problems

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Half scale
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Double scale
Find fourth proportional to 623.11, 859.64 and 402.19
Similar ratio
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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.