Home / 2,804.90-3,871.05-1,686.20

Finding the Fourth Proportional to 2,804.90, 3,871.05 and 1,686.20

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Solution

The fourth proportional to 2,804.90, 3,871.05 and 1,686.20 is: 2,327.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,804.90 : 3,871.05 = 1,686.20 : x
  2. Step 2: Convert to fraction form
    2,804.90/3,871.05 = 1,686.20/x
  3. Step 3: Cross multiply
    2,804.90x = 3,871.05 × 1,686.20
  4. Step 4: Simplify right side
    2,804.90x = 6,527,364.51
  5. Step 5: Solve for x
    x = 6,527,364.51/2,804.90
  6. Step 6: Final answer
    x = 2,327.13

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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.