Home / 450,014.72-620,880-299,137.28

Finding the Fourth Proportional to 450,014.72, 620,880 and 299,137.28

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Solution

The fourth proportional to 450,014.72, 620,880 and 299,137.28 is: 412,716.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,014.72 : 620,880 = 299,137.28 : x
  2. Step 2: Convert to fraction form
    450,014.72/620,880 = 299,137.28/x
  3. Step 3: Cross multiply
    450,014.72x = 620,880 × 299,137.28
  4. Step 4: Simplify right side
    450,014.72x = 185,728,354,406.40
  5. Step 5: Solve for x
    x = 185,728,354,406.40/450,014.72
  6. Step 6: Final answer
    x = 412,716.18

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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.