Home / 1,211.19-1,816.26-389.01

Finding the Fourth Proportional to 1,211.19, 1,816.26 and 389.01

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Solution

The fourth proportional to 1,211.19, 1,816.26 and 389.01 is: 583.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.19 : 1,816.26 = 389.01 : x
  2. Step 2: Convert to fraction form
    1,211.19/1,816.26 = 389.01/x
  3. Step 3: Cross multiply
    1,211.19x = 1,816.26 × 389.01
  4. Step 4: Simplify right side
    1,211.19x = 706,543.30
  5. Step 5: Solve for x
    x = 706,543.30/1,211.19
  6. Step 6: Final answer
    x = 583.35

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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.