Home / 2,688.52-3,708.84-1,638.76

Finding the Fourth Proportional to 2,688.52, 3,708.84 and 1,638.76

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Solution

The fourth proportional to 2,688.52, 3,708.84 and 1,638.76 is: 2,260.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.52 : 3,708.84 = 1,638.76 : x
  2. Step 2: Convert to fraction form
    2,688.52/3,708.84 = 1,638.76/x
  3. Step 3: Cross multiply
    2,688.52x = 3,708.84 × 1,638.76
  4. Step 4: Simplify right side
    2,688.52x = 6,077,898.64
  5. Step 5: Solve for x
    x = 6,077,898.64/2,688.52
  6. Step 6: Final answer
    x = 2,260.69

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Half scale
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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.