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Finding the Fourth Proportional to 830.67, 1,245.99 and 282.84

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Solution

The fourth proportional to 830.67, 1,245.99 and 282.84 is: 424.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.67 : 1,245.99 = 282.84 : x
  2. Step 2: Convert to fraction form
    830.67/1,245.99 = 282.84/x
  3. Step 3: Cross multiply
    830.67x = 1,245.99 × 282.84
  4. Step 4: Simplify right side
    830.67x = 352,415.81
  5. Step 5: Solve for x
    x = 352,415.81/830.67
  6. Step 6: Final answer
    x = 424.25

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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.