Home / 2,688.69-4,030.12-1,129.55

Finding the Fourth Proportional to 2,688.69, 4,030.12 and 1,129.55

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Solution

The fourth proportional to 2,688.69, 4,030.12 and 1,129.55 is: 1,693.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.69 : 4,030.12 = 1,129.55 : x
  2. Step 2: Convert to fraction form
    2,688.69/4,030.12 = 1,129.55/x
  3. Step 3: Cross multiply
    2,688.69x = 4,030.12 × 1,129.55
  4. Step 4: Simplify right side
    2,688.69x = 4,552,203.31
  5. Step 5: Solve for x
    x = 4,552,203.31/2,688.69
  6. Step 6: Final answer
    x = 1,693.09

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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.