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Finding the Fourth Proportional to 1,479.82, 2,219.94 and 658.08

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Solution

The fourth proportional to 1,479.82, 2,219.94 and 658.08 is: 987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.82 : 2,219.94 = 658.08 : x
  2. Step 2: Convert to fraction form
    1,479.82/2,219.94 = 658.08/x
  3. Step 3: Cross multiply
    1,479.82x = 2,219.94 × 658.08
  4. Step 4: Simplify right side
    1,479.82x = 1,460,898.12
  5. Step 5: Solve for x
    x = 1,460,898.12/1,479.82
  6. Step 6: Final answer
    x = 987.21

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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.