Home / 1,318,723.02-1,978,382.88-420,215.94

Finding the Fourth Proportional to 1,318,723.02, 1,978,382.88 and 420,215.94

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Solution

The fourth proportional to 1,318,723.02, 1,978,382.88 and 420,215.94 is: 630,418.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,723.02 : 1,978,382.88 = 420,215.94 : x
  2. Step 2: Convert to fraction form
    1,318,723.02/1,978,382.88 = 420,215.94/x
  3. Step 3: Cross multiply
    1,318,723.02x = 1,978,382.88 × 420,215.94
  4. Step 4: Simplify right side
    1,318,723.02x = 831,348,021,599.11
  5. Step 5: Solve for x
    x = 831,348,021,599.11/1,318,723.02
  6. Step 6: Final answer
    x = 630,418.98

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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.