Home / 1,318,400.40-1,974,976.20-687,669.60

Finding the Fourth Proportional to 1,318,400.40, 1,974,976.20 and 687,669.60

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Solution

The fourth proportional to 1,318,400.40, 1,974,976.20 and 687,669.60 is: 1,030,135.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,400.40 : 1,974,976.20 = 687,669.60 : x
  2. Step 2: Convert to fraction form
    1,318,400.40/1,974,976.20 = 687,669.60/x
  3. Step 3: Cross multiply
    1,318,400.40x = 1,974,976.20 × 687,669.60
  4. Step 4: Simplify right side
    1,318,400.40x = 1,358,131,093,463.52
  5. Step 5: Solve for x
    x = 1,358,131,093,463.52/1,318,400.40
  6. Step 6: Final answer
    x = 1,030,135.53

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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.