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Finding the Fourth Proportional to 1,245.65, 1,870.59 and 1,195.99

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Solution

The fourth proportional to 1,245.65, 1,870.59 and 1,195.99 is: 1,796.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.65 : 1,870.59 = 1,195.99 : x
  2. Step 2: Convert to fraction form
    1,245.65/1,870.59 = 1,195.99/x
  3. Step 3: Cross multiply
    1,245.65x = 1,870.59 × 1,195.99
  4. Step 4: Simplify right side
    1,245.65x = 2,237,206.93
  5. Step 5: Solve for x
    x = 2,237,206.93/1,245.65
  6. Step 6: Final answer
    x = 1,796.02

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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.