Home / 1,211.18-1,816.76-345.49

Finding the Fourth Proportional to 1,211.18, 1,816.76 and 345.49

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Solution

The fourth proportional to 1,211.18, 1,816.76 and 345.49 is: 518.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.18 : 1,816.76 = 345.49 : x
  2. Step 2: Convert to fraction form
    1,211.18/1,816.76 = 345.49/x
  3. Step 3: Cross multiply
    1,211.18x = 1,816.76 × 345.49
  4. Step 4: Simplify right side
    1,211.18x = 627,672.41
  5. Step 5: Solve for x
    x = 627,672.41/1,211.18
  6. Step 6: Final answer
    x = 518.23

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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.