Home / 2,459.12-3,687.28-815.22

Finding the Fourth Proportional to 2,459.12, 3,687.28 and 815.22

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Solution

The fourth proportional to 2,459.12, 3,687.28 and 815.22 is: 1,222.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,459.12 : 3,687.28 = 815.22 : x
  2. Step 2: Convert to fraction form
    2,459.12/3,687.28 = 815.22/x
  3. Step 3: Cross multiply
    2,459.12x = 3,687.28 × 815.22
  4. Step 4: Simplify right side
    2,459.12x = 3,005,942.36
  5. Step 5: Solve for x
    x = 3,005,942.36/2,459.12
  6. Step 6: Final answer
    x = 1,222.37

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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.