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Finding the Fourth Proportional to 2,981,912.40, 4,472,868.60 and 987,368.40

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Solution

The fourth proportional to 2,981,912.40, 4,472,868.60 and 987,368.40 is: 1,481,052.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981,912.40 : 4,472,868.60 = 987,368.40 : x
  2. Step 2: Convert to fraction form
    2,981,912.40/4,472,868.60 = 987,368.40/x
  3. Step 3: Cross multiply
    2,981,912.40x = 4,472,868.60 × 987,368.40
  4. Step 4: Simplify right side
    2,981,912.40x = 4,416,369,112,992.24
  5. Step 5: Solve for x
    x = 4,416,369,112,992.24/2,981,912.40
  6. Step 6: Final answer
    x = 1,481,052.60

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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.