Home / 2,688.55-4,034.39-1,128.43

Finding the Fourth Proportional to 2,688.55, 4,034.39 and 1,128.43

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Solution

The fourth proportional to 2,688.55, 4,034.39 and 1,128.43 is: 1,693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.55 : 4,034.39 = 1,128.43 : x
  2. Step 2: Convert to fraction form
    2,688.55/4,034.39 = 1,128.43/x
  3. Step 3: Cross multiply
    2,688.55x = 4,034.39 × 1,128.43
  4. Step 4: Simplify right side
    2,688.55x = 4,552,526.71
  5. Step 5: Solve for x
    x = 4,552,526.71/2,688.55
  6. Step 6: Final answer
    x = 1,693.30

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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.