Home / 1,854.80-2,781.56-621.92

Finding the Fourth Proportional to 1,854.80, 2,781.56 and 621.92

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Solution

The fourth proportional to 1,854.80, 2,781.56 and 621.92 is: 932.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,854.80 : 2,781.56 = 621.92 : x
  2. Step 2: Convert to fraction form
    1,854.80/2,781.56 = 621.92/x
  3. Step 3: Cross multiply
    1,854.80x = 2,781.56 × 621.92
  4. Step 4: Simplify right side
    1,854.80x = 1,729,907.80
  5. Step 5: Solve for x
    x = 1,729,907.80/1,854.80
  6. Step 6: Final answer
    x = 932.67

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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.