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Finding the Fourth Proportional to 1,246.68, 1,870.80 and 699.22

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Solution

The fourth proportional to 1,246.68, 1,870.80 and 699.22 is: 1,049.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.68 : 1,870.80 = 699.22 : x
  2. Step 2: Convert to fraction form
    1,246.68/1,870.80 = 699.22/x
  3. Step 3: Cross multiply
    1,246.68x = 1,870.80 × 699.22
  4. Step 4: Simplify right side
    1,246.68x = 1,308,100.78
  5. Step 5: Solve for x
    x = 1,308,100.78/1,246.68
  6. Step 6: Final answer
    x = 1,049.27

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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.