Home / 2,487.36-3,731.48-820.99

Finding the Fourth Proportional to 2,487.36, 3,731.48 and 820.99

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Solution

The fourth proportional to 2,487.36, 3,731.48 and 820.99 is: 1,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.36 : 3,731.48 = 820.99 : x
  2. Step 2: Convert to fraction form
    2,487.36/3,731.48 = 820.99/x
  3. Step 3: Cross multiply
    2,487.36x = 3,731.48 × 820.99
  4. Step 4: Simplify right side
    2,487.36x = 3,063,507.77
  5. Step 5: Solve for x
    x = 3,063,507.77/2,487.36
  6. Step 6: Final answer
    x = 1,231.63

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1.5x scale

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.