Home / 5,245.40-7,238.66-2,887.68

Finding the Fourth Proportional to 5,245.40, 7,238.66 and 2,887.68

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Solution

The fourth proportional to 5,245.40, 7,238.66 and 2,887.68 is: 3,985.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.40 : 7,238.66 = 2,887.68 : x
  2. Step 2: Convert to fraction form
    5,245.40/7,238.66 = 2,887.68/x
  3. Step 3: Cross multiply
    5,245.40x = 7,238.66 × 2,887.68
  4. Step 4: Simplify right side
    5,245.40x = 20,902,933.71
  5. Step 5: Solve for x
    x = 20,902,933.71/5,245.40
  6. Step 6: Final answer
    x = 3,985.00

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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.