Home / 3,178.63-4,386.68-1,781.47

Finding the Fourth Proportional to 3,178.63, 4,386.68 and 1,781.47

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Solution

The fourth proportional to 3,178.63, 4,386.68 and 1,781.47 is: 2,458.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.63 : 4,386.68 = 1,781.47 : x
  2. Step 2: Convert to fraction form
    3,178.63/4,386.68 = 1,781.47/x
  3. Step 3: Cross multiply
    3,178.63x = 4,386.68 × 1,781.47
  4. Step 4: Simplify right side
    3,178.63x = 7,814,721.34
  5. Step 5: Solve for x
    x = 7,814,721.34/3,178.63
  6. Step 6: Final answer
    x = 2,458.52

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1.5x scale

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.