Home / 3,178.65-4,386.53-1,781.37

Finding the Fourth Proportional to 3,178.65, 4,386.53 and 1,781.37

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Solution

The fourth proportional to 3,178.65, 4,386.53 and 1,781.37 is: 2,458.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.65 : 4,386.53 = 1,781.37 : x
  2. Step 2: Convert to fraction form
    3,178.65/4,386.53 = 1,781.37/x
  3. Step 3: Cross multiply
    3,178.65x = 4,386.53 × 1,781.37
  4. Step 4: Simplify right side
    3,178.65x = 7,814,024.04
  5. Step 5: Solve for x
    x = 7,814,024.04/3,178.65
  6. Step 6: Final answer
    x = 2,458.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.