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Finding the Fourth Proportional to 1,476.65, 2,214.43 and 489.29

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Solution

The fourth proportional to 1,476.65, 2,214.43 and 489.29 is: 733.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.65 : 2,214.43 = 489.29 : x
  2. Step 2: Convert to fraction form
    1,476.65/2,214.43 = 489.29/x
  3. Step 3: Cross multiply
    1,476.65x = 2,214.43 × 489.29
  4. Step 4: Simplify right side
    1,476.65x = 1,083,486.16
  5. Step 5: Solve for x
    x = 1,083,486.16/1,476.65
  6. Step 6: Final answer
    x = 733.74

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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.