Home / 2,688.21-4,032.59-1,128.74

Finding the Fourth Proportional to 2,688.21, 4,032.59 and 1,128.74

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Solution

The fourth proportional to 2,688.21, 4,032.59 and 1,128.74 is: 1,693.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.21 : 4,032.59 = 1,128.74 : x
  2. Step 2: Convert to fraction form
    2,688.21/4,032.59 = 1,128.74/x
  3. Step 3: Cross multiply
    2,688.21x = 4,032.59 × 1,128.74
  4. Step 4: Simplify right side
    2,688.21x = 4,551,719.83
  5. Step 5: Solve for x
    x = 4,551,719.83/2,688.21
  6. Step 6: Final answer
    x = 1,693.22

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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.