Home / 1,318,801.15-1,978,180.26-420,230.76

Finding the Fourth Proportional to 1,318,801.15, 1,978,180.26 and 420,230.76

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Solution

The fourth proportional to 1,318,801.15, 1,978,180.26 and 420,230.76 is: 630,339.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,801.15 : 1,978,180.26 = 420,230.76 : x
  2. Step 2: Convert to fraction form
    1,318,801.15/1,978,180.26 = 420,230.76/x
  3. Step 3: Cross multiply
    1,318,801.15x = 1,978,180.26 × 420,230.76
  4. Step 4: Simplify right side
    1,318,801.15x = 831,292,194,076.80
  5. Step 5: Solve for x
    x = 831,292,194,076.80/1,318,801.15
  6. Step 6: Final answer
    x = 630,339.30

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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.