Home / 1,518.74-2,278.23-423.11

Finding the Fourth Proportional to 1,518.74, 2,278.23 and 423.11

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Solution

The fourth proportional to 1,518.74, 2,278.23 and 423.11 is: 634.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.74 : 2,278.23 = 423.11 : x
  2. Step 2: Convert to fraction form
    1,518.74/2,278.23 = 423.11/x
  3. Step 3: Cross multiply
    1,518.74x = 2,278.23 × 423.11
  4. Step 4: Simplify right side
    1,518.74x = 963,941.90
  5. Step 5: Solve for x
    x = 963,941.90/1,518.74
  6. Step 6: Final answer
    x = 634.70

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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.