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Finding the Fourth Proportional to 1,476.47, 2,214.21 and 489.05

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Solution

The fourth proportional to 1,476.47, 2,214.21 and 489.05 is: 733.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.47 : 2,214.21 = 489.05 : x
  2. Step 2: Convert to fraction form
    1,476.47/2,214.21 = 489.05/x
  3. Step 3: Cross multiply
    1,476.47x = 2,214.21 × 489.05
  4. Step 4: Simplify right side
    1,476.47x = 1,082,864.94
  5. Step 5: Solve for x
    x = 1,082,864.94/1,476.47
  6. Step 6: Final answer
    x = 733.42

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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.