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Finding the Fourth Proportional to 1,219.02, 1,828.51 and 488.80

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Solution

The fourth proportional to 1,219.02, 1,828.51 and 488.80 is: 733.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.02 : 1,828.51 = 488.80 : x
  2. Step 2: Convert to fraction form
    1,219.02/1,828.51 = 488.80/x
  3. Step 3: Cross multiply
    1,219.02x = 1,828.51 × 488.80
  4. Step 4: Simplify right side
    1,219.02x = 893,775.69
  5. Step 5: Solve for x
    x = 893,775.69/1,219.02
  6. Step 6: Final answer
    x = 733.19

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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.