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Finding the Fourth Proportional to 1,219.65, 1,828.00 and 700.00

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Solution

The fourth proportional to 1,219.65, 1,828.00 and 700.00 is: 1,049.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.65 : 1,828.00 = 700.00 : x
  2. Step 2: Convert to fraction form
    1,219.65/1,828.00 = 700.00/x
  3. Step 3: Cross multiply
    1,219.65x = 1,828.00 × 700.00
  4. Step 4: Simplify right side
    1,219.65x = 1,279,596.30
  5. Step 5: Solve for x
    x = 1,279,596.30/1,219.65
  6. Step 6: Final answer
    x = 1,049.15

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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.