Home / 1,790.89-2,686.60-621.18

Finding the Fourth Proportional to 1,790.89, 2,686.60 and 621.18

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Solution

The fourth proportional to 1,790.89, 2,686.60 and 621.18 is: 931.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.89 : 2,686.60 = 621.18 : x
  2. Step 2: Convert to fraction form
    1,790.89/2,686.60 = 621.18/x
  3. Step 3: Cross multiply
    1,790.89x = 2,686.60 × 621.18
  4. Step 4: Simplify right side
    1,790.89x = 1,668,862.19
  5. Step 5: Solve for x
    x = 1,668,862.19/1,790.89
  6. Step 6: Final answer
    x = 931.86

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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.