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Finding the Fourth Proportional to 719,490.90, 992,891.50 and 397,194.13

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Solution

The fourth proportional to 719,490.90, 992,891.50 and 397,194.13 is: 548,124.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,490.90 : 992,891.50 = 397,194.13 : x
  2. Step 2: Convert to fraction form
    719,490.90/992,891.50 = 397,194.13/x
  3. Step 3: Cross multiply
    719,490.90x = 992,891.50 × 397,194.13
  4. Step 4: Simplify right side
    719,490.90x = 394,370,670,562.44
  5. Step 5: Solve for x
    x = 394,370,670,562.44/719,490.90
  6. Step 6: Final answer
    x = 548,124.61

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1.5x scale

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.