Home / 1,211.34-1,817.01-345.66

Finding the Fourth Proportional to 1,211.34, 1,817.01 and 345.66

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Solution

The fourth proportional to 1,211.34, 1,817.01 and 345.66 is: 518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.34 : 1,817.01 = 345.66 : x
  2. Step 2: Convert to fraction form
    1,211.34/1,817.01 = 345.66/x
  3. Step 3: Cross multiply
    1,211.34x = 1,817.01 × 345.66
  4. Step 4: Simplify right side
    1,211.34x = 628,067.68
  5. Step 5: Solve for x
    x = 628,067.68/1,211.34
  6. Step 6: Final answer
    x = 518.49

Related Problems

Find fourth proportional to 605.67, 908.51 and 172.83
Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.