Home / 2,765.79-3,818.15-1,886.21

Finding the Fourth Proportional to 2,765.79, 3,818.15 and 1,886.21

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Solution

The fourth proportional to 2,765.79, 3,818.15 and 1,886.21 is: 2,603.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.79 : 3,818.15 = 1,886.21 : x
  2. Step 2: Convert to fraction form
    2,765.79/3,818.15 = 1,886.21/x
  3. Step 3: Cross multiply
    2,765.79x = 3,818.15 × 1,886.21
  4. Step 4: Simplify right side
    2,765.79x = 7,201,804.19
  5. Step 5: Solve for x
    x = 7,201,804.19/2,765.79
  6. Step 6: Final answer
    x = 2,603.89

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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.