Home / 3,138.48-4,703.63-1,287.51

Finding the Fourth Proportional to 3,138.48, 4,703.63 and 1,287.51

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Solution

The fourth proportional to 3,138.48, 4,703.63 and 1,287.51 is: 1,929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.48 : 4,703.63 = 1,287.51 : x
  2. Step 2: Convert to fraction form
    3,138.48/4,703.63 = 1,287.51/x
  3. Step 3: Cross multiply
    3,138.48x = 4,703.63 × 1,287.51
  4. Step 4: Simplify right side
    3,138.48x = 6,055,946.59
  5. Step 5: Solve for x
    x = 6,055,946.59/3,138.48
  6. Step 6: Final answer
    x = 1,929.58

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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.