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Finding the Fourth Proportional to 4,978,672.40, 7,465,243.80 and 1,983,472.40

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Solution

The fourth proportional to 4,978,672.40, 7,465,243.80 and 1,983,472.40 is: 2,974,107.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978,672.40 : 7,465,243.80 = 1,983,472.40 : x
  2. Step 2: Convert to fraction form
    4,978,672.40/7,465,243.80 = 1,983,472.40/x
  3. Step 3: Cross multiply
    4,978,672.40x = 7,465,243.80 × 1,983,472.40
  4. Step 4: Simplify right side
    4,978,672.40x = 14,807,105,036,571.12
  5. Step 5: Solve for x
    x = 14,807,105,036,571.12/4,978,672.40
  6. Step 6: Final answer
    x = 2,974,107.12

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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.