Home / 2,688.30-4,030.38-838.35

Finding the Fourth Proportional to 2,688.30, 4,030.38 and 838.35

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Solution

The fourth proportional to 2,688.30, 4,030.38 and 838.35 is: 1,256.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.30 : 4,030.38 = 838.35 : x
  2. Step 2: Convert to fraction form
    2,688.30/4,030.38 = 838.35/x
  3. Step 3: Cross multiply
    2,688.30x = 4,030.38 × 838.35
  4. Step 4: Simplify right side
    2,688.30x = 3,378,869.07
  5. Step 5: Solve for x
    x = 3,378,869.07/2,688.30
  6. Step 6: Final answer
    x = 1,256.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.