Home / 1,219,118.34-1,828,765.20-420,388.38

Finding the Fourth Proportional to 1,219,118.34, 1,828,765.20 and 420,388.38

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Solution

The fourth proportional to 1,219,118.34, 1,828,765.20 and 420,388.38 is: 630,612.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,118.34 : 1,828,765.20 = 420,388.38 : x
  2. Step 2: Convert to fraction form
    1,219,118.34/1,828,765.20 = 420,388.38/x
  3. Step 3: Cross multiply
    1,219,118.34x = 1,828,765.20 × 420,388.38
  4. Step 4: Simplify right side
    1,219,118.34x = 768,791,639,040.15
  5. Step 5: Solve for x
    x = 768,791,639,040.15/1,219,118.34
  6. Step 6: Final answer
    x = 630,612.81

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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.