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Finding the Fourth Proportional to 3,330.58, 4,996.87 and 990.67

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Solution

The fourth proportional to 3,330.58, 4,996.87 and 990.67 is: 1,486.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,330.58 : 4,996.87 = 990.67 : x
  2. Step 2: Convert to fraction form
    3,330.58/4,996.87 = 990.67/x
  3. Step 3: Cross multiply
    3,330.58x = 4,996.87 × 990.67
  4. Step 4: Simplify right side
    3,330.58x = 4,950,221.74
  5. Step 5: Solve for x
    x = 4,950,221.74/3,330.58
  6. Step 6: Final answer
    x = 1,486.29

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,331.58, 4,998.37 and 991.67
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.