Home / 1,318,774.55-1,978,140.21-420,204.15

Finding the Fourth Proportional to 1,318,774.55, 1,978,140.21 and 420,204.15

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Solution

The fourth proportional to 1,318,774.55, 1,978,140.21 and 420,204.15 is: 630,299.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,774.55 : 1,978,140.21 = 420,204.15 : x
  2. Step 2: Convert to fraction form
    1,318,774.55/1,978,140.21 = 420,204.15/x
  3. Step 3: Cross multiply
    1,318,774.55x = 1,978,140.21 × 420,204.15
  4. Step 4: Simplify right side
    1,318,774.55x = 831,222,725,523.87
  5. Step 5: Solve for x
    x = 831,222,725,523.87/1,318,774.55
  6. Step 6: Final answer
    x = 630,299.34

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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.