Home / 1,272.08-1,906.47-1,025.40

Finding the Fourth Proportional to 1,272.08, 1,906.47 and 1,025.40

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Solution

The fourth proportional to 1,272.08, 1,906.47 and 1,025.40 is: 1,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.08 : 1,906.47 = 1,025.40 : x
  2. Step 2: Convert to fraction form
    1,272.08/1,906.47 = 1,025.40/x
  3. Step 3: Cross multiply
    1,272.08x = 1,906.47 × 1,025.40
  4. Step 4: Simplify right side
    1,272.08x = 1,954,894.34
  5. Step 5: Solve for x
    x = 1,954,894.34/1,272.08
  6. Step 6: Final answer
    x = 1,536.77

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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.