Home / 1,318,810.28-1,978,193.95-420,239.88

Finding the Fourth Proportional to 1,318,810.28, 1,978,193.95 and 420,239.88

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Solution

The fourth proportional to 1,318,810.28, 1,978,193.95 and 420,239.88 is: 630,352.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,810.28 : 1,978,193.95 = 420,239.88 : x
  2. Step 2: Convert to fraction form
    1,318,810.28/1,978,193.95 = 420,239.88/x
  3. Step 3: Cross multiply
    1,318,810.28x = 1,978,193.95 × 420,239.88
  4. Step 4: Simplify right side
    1,318,810.28x = 831,315,987,114.13
  5. Step 5: Solve for x
    x = 831,315,987,114.13/1,318,810.28
  6. Step 6: Final answer
    x = 630,352.98

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.