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Finding the Fourth Proportional to 4,985.82, 6,879 and 3,218.46

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Solution

The fourth proportional to 4,985.82, 6,879 and 3,218.46 is: 4,440.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.82 : 6,879 = 3,218.46 : x
  2. Step 2: Convert to fraction form
    4,985.82/6,879 = 3,218.46/x
  3. Step 3: Cross multiply
    4,985.82x = 6,879 × 3,218.46
  4. Step 4: Simplify right side
    4,985.82x = 22,139,786.34
  5. Step 5: Solve for x
    x = 22,139,786.34/4,985.82
  6. Step 6: Final answer
    x = 4,440.55

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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.