Home / 2,669.90-3,686.19-2,389.64

Finding the Fourth Proportional to 2,669.90, 3,686.19 and 2,389.64

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Solution

The fourth proportional to 2,669.90, 3,686.19 and 2,389.64 is: 3,299.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,669.90 : 3,686.19 = 2,389.64 : x
  2. Step 2: Convert to fraction form
    2,669.90/3,686.19 = 2,389.64/x
  3. Step 3: Cross multiply
    2,669.90x = 3,686.19 × 2,389.64
  4. Step 4: Simplify right side
    2,669.90x = 8,808,670.31
  5. Step 5: Solve for x
    x = 8,808,670.31/2,669.90
  6. Step 6: Final answer
    x = 3,299.26

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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.