Home / 1,890.51-2,610.12-1,218.62

Finding the Fourth Proportional to 1,890.51, 2,610.12 and 1,218.62

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Solution

The fourth proportional to 1,890.51, 2,610.12 and 1,218.62 is: 1,682.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.51 : 2,610.12 = 1,218.62 : x
  2. Step 2: Convert to fraction form
    1,890.51/2,610.12 = 1,218.62/x
  3. Step 3: Cross multiply
    1,890.51x = 2,610.12 × 1,218.62
  4. Step 4: Simplify right side
    1,890.51x = 3,180,731.38
  5. Step 5: Solve for x
    x = 3,180,731.38/1,890.51
  6. Step 6: Final answer
    x = 1,682.47

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1.5x scale

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.