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Finding the Fourth Proportional to 719,477.92, 992,881 and 397,188.46

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Solution

The fourth proportional to 719,477.92, 992,881 and 397,188.46 is: 548,120.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,477.92 : 992,881 = 397,188.46 : x
  2. Step 2: Convert to fraction form
    719,477.92/992,881 = 397,188.46/x
  3. Step 3: Cross multiply
    719,477.92x = 992,881 × 397,188.46
  4. Step 4: Simplify right side
    719,477.92x = 394,360,875,353.26
  5. Step 5: Solve for x
    x = 394,360,875,353.26/719,477.92
  6. Step 6: Final answer
    x = 548,120.89

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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.