Home / 1,145.41-1,580.66-621.44

Finding the Fourth Proportional to 1,145.41, 1,580.66 and 621.44

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Solution

The fourth proportional to 1,145.41, 1,580.66 and 621.44 is: 857.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.41 : 1,580.66 = 621.44 : x
  2. Step 2: Convert to fraction form
    1,145.41/1,580.66 = 621.44/x
  3. Step 3: Cross multiply
    1,145.41x = 1,580.66 × 621.44
  4. Step 4: Simplify right side
    1,145.41x = 982,285.35
  5. Step 5: Solve for x
    x = 982,285.35/1,145.41
  6. Step 6: Final answer
    x = 857.58

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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.