Home / 1,621.31-2,237.76-1,355.45

Finding the Fourth Proportional to 1,621.31, 2,237.76 and 1,355.45

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Solution

The fourth proportional to 1,621.31, 2,237.76 and 1,355.45 is: 1,870.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.31 : 2,237.76 = 1,355.45 : x
  2. Step 2: Convert to fraction form
    1,621.31/2,237.76 = 1,355.45/x
  3. Step 3: Cross multiply
    1,621.31x = 2,237.76 × 1,355.45
  4. Step 4: Simplify right side
    1,621.31x = 3,033,160.60
  5. Step 5: Solve for x
    x = 3,033,160.60/1,621.31
  6. Step 6: Final answer
    x = 1,870.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.