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Finding the Fourth Proportional to 1,397,425.65, 1,929,911.31 and 962,972.64

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Solution

The fourth proportional to 1,397,425.65, 1,929,911.31 and 962,972.64 is: 1,329,911.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,425.65 : 1,929,911.31 = 962,972.64 : x
  2. Step 2: Convert to fraction form
    1,397,425.65/1,929,911.31 = 962,972.64/x
  3. Step 3: Cross multiply
    1,397,425.65x = 1,929,911.31 × 962,972.64
  4. Step 4: Simplify right side
    1,397,425.65x = 1,858,451,789,156.56
  5. Step 5: Solve for x
    x = 1,858,451,789,156.56/1,397,425.65
  6. Step 6: Final answer
    x = 1,329,911.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.