Home / 1,318,781.77-1,978,151.05-420,211.35

Finding the Fourth Proportional to 1,318,781.77, 1,978,151.05 and 420,211.35

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Solution

The fourth proportional to 1,318,781.77, 1,978,151.05 and 420,211.35 is: 630,310.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,781.77 : 1,978,151.05 = 420,211.35 : x
  2. Step 2: Convert to fraction form
    1,318,781.77/1,978,151.05 = 420,211.35/x
  3. Step 3: Cross multiply
    1,318,781.77x = 1,978,151.05 × 420,211.35
  4. Step 4: Simplify right side
    1,318,781.77x = 831,241,523,749.68
  5. Step 5: Solve for x
    x = 831,241,523,749.68/1,318,781.77
  6. Step 6: Final answer
    x = 630,310.14

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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.