Home / 1,318,876.65-1,978,277.92-420,372.20

Finding the Fourth Proportional to 1,318,876.65, 1,978,277.92 and 420,372.20

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Solution

The fourth proportional to 1,318,876.65, 1,978,277.92 and 420,372.20 is: 630,546.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,876.65 : 1,978,277.92 = 420,372.20 : x
  2. Step 2: Convert to fraction form
    1,318,876.65/1,978,277.92 = 420,372.20/x
  3. Step 3: Cross multiply
    1,318,876.65x = 1,978,277.92 × 420,372.20
  4. Step 4: Simplify right side
    1,318,876.65x = 831,613,045,336.59
  5. Step 5: Solve for x
    x = 831,613,045,336.59/1,318,876.65
  6. Step 6: Final answer
    x = 630,546.49

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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.