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Finding the Fourth Proportional to 1,397,426.65, 1,929,912.69 and 962,973.64

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Solution

The fourth proportional to 1,397,426.65, 1,929,912.69 and 962,973.64 is: 1,329,912.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,426.65 : 1,929,912.69 = 962,973.64 : x
  2. Step 2: Convert to fraction form
    1,397,426.65/1,929,912.69 = 962,973.64/x
  3. Step 3: Cross multiply
    1,397,426.65x = 1,929,912.69 × 962,973.64
  4. Step 4: Simplify right side
    1,397,426.65x = 1,858,455,047,971.49
  5. Step 5: Solve for x
    x = 1,858,455,047,971.49/1,397,426.65
  6. Step 6: Final answer
    x = 1,329,912.41

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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.