Home / 2,688.80-3,708.58-1,641.20

Finding the Fourth Proportional to 2,688.80, 3,708.58 and 1,641.20

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Solution

The fourth proportional to 2,688.80, 3,708.58 and 1,641.20 is: 2,263.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.80 : 3,708.58 = 1,641.20 : x
  2. Step 2: Convert to fraction form
    2,688.80/3,708.58 = 1,641.20/x
  3. Step 3: Cross multiply
    2,688.80x = 3,708.58 × 1,641.20
  4. Step 4: Simplify right side
    2,688.80x = 6,086,521.50
  5. Step 5: Solve for x
    x = 6,086,521.50/2,688.80
  6. Step 6: Final answer
    x = 2,263.66

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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.