Home / 1,518.68-2,278.10-423.04

Finding the Fourth Proportional to 1,518.68, 2,278.10 and 423.04

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Solution

The fourth proportional to 1,518.68, 2,278.10 and 423.04 is: 634.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.68 : 2,278.10 = 423.04 : x
  2. Step 2: Convert to fraction form
    1,518.68/2,278.10 = 423.04/x
  3. Step 3: Cross multiply
    1,518.68x = 2,278.10 × 423.04
  4. Step 4: Simplify right side
    1,518.68x = 963,727.42
  5. Step 5: Solve for x
    x = 963,727.42/1,518.68
  6. Step 6: Final answer
    x = 634.58

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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.