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Finding the Fourth Proportional to 719,485.19, 992,897.61 and 397,195.46

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Solution

The fourth proportional to 719,485.19, 992,897.61 and 397,195.46 is: 548,134.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,485.19 : 992,897.61 = 397,195.46 : x
  2. Step 2: Convert to fraction form
    719,485.19/992,897.61 = 397,195.46/x
  3. Step 3: Cross multiply
    719,485.19x = 992,897.61 × 397,195.46
  4. Step 4: Simplify right side
    719,485.19x = 394,374,422,936.85
  5. Step 5: Solve for x
    x = 394,374,422,936.85/719,485.19
  6. Step 6: Final answer
    x = 548,134.18

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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.