Home / 1,211.19-1,816.77-864.68

Finding the Fourth Proportional to 1,211.19, 1,816.77 and 864.68

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Solution

The fourth proportional to 1,211.19, 1,816.77 and 864.68 is: 1,297.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.19 : 1,816.77 = 864.68 : x
  2. Step 2: Convert to fraction form
    1,211.19/1,816.77 = 864.68/x
  3. Step 3: Cross multiply
    1,211.19x = 1,816.77 × 864.68
  4. Step 4: Simplify right side
    1,211.19x = 1,570,915.60
  5. Step 5: Solve for x
    x = 1,570,915.60/1,211.19
  6. Step 6: Final answer
    x = 1,297.00

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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.