Home / 1,318,770.05-1,978,133.47-420,199.65

Finding the Fourth Proportional to 1,318,770.05, 1,978,133.47 and 420,199.65

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Solution

The fourth proportional to 1,318,770.05, 1,978,133.47 and 420,199.65 is: 630,292.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,770.05 : 1,978,133.47 = 420,199.65 : x
  2. Step 2: Convert to fraction form
    1,318,770.05/1,978,133.47 = 420,199.65/x
  3. Step 3: Cross multiply
    1,318,770.05x = 1,978,133.47 × 420,199.65
  4. Step 4: Simplify right side
    1,318,770.05x = 831,210,990,696.79
  5. Step 5: Solve for x
    x = 831,210,990,696.79/1,318,770.05
  6. Step 6: Final answer
    x = 630,292.59

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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.