Home / 1,318,859.43-1,978,267.55-420,289.17

Finding the Fourth Proportional to 1,318,859.43, 1,978,267.55 and 420,289.17

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Solution

The fourth proportional to 1,318,859.43, 1,978,267.55 and 420,289.17 is: 630,426.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,859.43 : 1,978,267.55 = 420,289.17 : x
  2. Step 2: Convert to fraction form
    1,318,859.43/1,978,267.55 = 420,289.17/x
  3. Step 3: Cross multiply
    1,318,859.43x = 1,978,267.55 × 420,289.17
  4. Step 4: Simplify right side
    1,318,859.43x = 831,444,424,525.99
  5. Step 5: Solve for x
    x = 831,444,424,525.99/1,318,859.43
  6. Step 6: Final answer
    x = 630,426.87

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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.