Home / 1,518.85-2,278.22-423.19

Finding the Fourth Proportional to 1,518.85, 2,278.22 and 423.19

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Solution

The fourth proportional to 1,518.85, 2,278.22 and 423.19 is: 634.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.85 : 2,278.22 = 423.19 : x
  2. Step 2: Convert to fraction form
    1,518.85/2,278.22 = 423.19/x
  3. Step 3: Cross multiply
    1,518.85x = 2,278.22 × 423.19
  4. Step 4: Simplify right side
    1,518.85x = 964,117.81
  5. Step 5: Solve for x
    x = 964,117.81/1,518.85
  6. Step 6: Final answer
    x = 634.77

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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.