Home / 2,688.40-3,711.32-1,695.21

Finding the Fourth Proportional to 2,688.40, 3,711.32 and 1,695.21

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Solution

The fourth proportional to 2,688.40, 3,711.32 and 1,695.21 is: 2,340.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.40 : 3,711.32 = 1,695.21 : x
  2. Step 2: Convert to fraction form
    2,688.40/3,711.32 = 1,695.21/x
  3. Step 3: Cross multiply
    2,688.40x = 3,711.32 × 1,695.21
  4. Step 4: Simplify right side
    2,688.40x = 6,291,466.78
  5. Step 5: Solve for x
    x = 6,291,466.78/2,688.40
  6. Step 6: Final answer
    x = 2,340.23

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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.