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Finding the Fourth Proportional to 719,476.12, 992,871.48 and 397,186.66

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Solution

The fourth proportional to 719,476.12, 992,871.48 and 397,186.66 is: 548,114.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,476.12 : 992,871.48 = 397,186.66 : x
  2. Step 2: Convert to fraction form
    719,476.12/992,871.48 = 397,186.66/x
  3. Step 3: Cross multiply
    719,476.12x = 992,871.48 × 397,186.66
  4. Step 4: Simplify right side
    719,476.12x = 394,355,306,950.46
  5. Step 5: Solve for x
    x = 394,355,306,950.46/719,476.12
  6. Step 6: Final answer
    x = 548,114.52

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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.