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Finding the Fourth Proportional to 1,379,571.61, 1,903,795.04 and 767,713.90

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Solution

The fourth proportional to 1,379,571.61, 1,903,795.04 and 767,713.90 is: 1,059,437.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,571.61 : 1,903,795.04 = 767,713.90 : x
  2. Step 2: Convert to fraction form
    1,379,571.61/1,903,795.04 = 767,713.90/x
  3. Step 3: Cross multiply
    1,379,571.61x = 1,903,795.04 × 767,713.90
  4. Step 4: Simplify right side
    1,379,571.61x = 1,461,569,914,959.06
  5. Step 5: Solve for x
    x = 1,461,569,914,959.06/1,379,571.61
  6. Step 6: Final answer
    x = 1,059,437.51

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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.