Home / 2,030.27-3,045.40-643.55

Finding the Fourth Proportional to 2,030.27, 3,045.40 and 643.55

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Solution

The fourth proportional to 2,030.27, 3,045.40 and 643.55 is: 965.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,030.27 : 3,045.40 = 643.55 : x
  2. Step 2: Convert to fraction form
    2,030.27/3,045.40 = 643.55/x
  3. Step 3: Cross multiply
    2,030.27x = 3,045.40 × 643.55
  4. Step 4: Simplify right side
    2,030.27x = 1,959,850.33
  5. Step 5: Solve for x
    x = 1,959,850.33/2,030.27
  6. Step 6: Final answer
    x = 965.32

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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.