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Finding the Fourth Proportional to 719,477.42, 992,880.31 and 397,187.96

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Solution

The fourth proportional to 719,477.42, 992,880.31 and 397,187.96 is: 548,120.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,477.42 : 992,880.31 = 397,187.96 : x
  2. Step 2: Convert to fraction form
    719,477.42/992,880.31 = 397,187.96/x
  3. Step 3: Cross multiply
    719,477.42x = 992,880.31 × 397,187.96
  4. Step 4: Simplify right side
    719,477.42x = 394,360,104,853.07
  5. Step 5: Solve for x
    x = 394,360,104,853.07/719,477.42
  6. Step 6: Final answer
    x = 548,120.20

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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.