Home / 1,519.12-2,278.64-423.45

Finding the Fourth Proportional to 1,519.12, 2,278.64 and 423.45

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Solution

The fourth proportional to 1,519.12, 2,278.64 and 423.45 is: 635.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.12 : 2,278.64 = 423.45 : x
  2. Step 2: Convert to fraction form
    1,519.12/2,278.64 = 423.45/x
  3. Step 3: Cross multiply
    1,519.12x = 2,278.64 × 423.45
  4. Step 4: Simplify right side
    1,519.12x = 964,890.11
  5. Step 5: Solve for x
    x = 964,890.11/1,519.12
  6. Step 6: Final answer
    x = 635.17

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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.