Home / 1,211.21-1,816.34-517.51

Finding the Fourth Proportional to 1,211.21, 1,816.34 and 517.51

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Solution

The fourth proportional to 1,211.21, 1,816.34 and 517.51 is: 776.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.21 : 1,816.34 = 517.51 : x
  2. Step 2: Convert to fraction form
    1,211.21/1,816.34 = 517.51/x
  3. Step 3: Cross multiply
    1,211.21x = 1,816.34 × 517.51
  4. Step 4: Simplify right side
    1,211.21x = 939,966.99
  5. Step 5: Solve for x
    x = 939,966.99/1,211.21
  6. Step 6: Final answer
    x = 776.06

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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.