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Finding the Fourth Proportional to 719,362.47, 992,720.31 and 397,072.64

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Solution

The fourth proportional to 719,362.47, 992,720.31 and 397,072.64 is: 547,960.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,362.47 : 992,720.31 = 397,072.64 : x
  2. Step 2: Convert to fraction form
    719,362.47/992,720.31 = 397,072.64/x
  3. Step 3: Cross multiply
    719,362.47x = 992,720.31 × 397,072.64
  4. Step 4: Simplify right side
    719,362.47x = 394,182,067,324.35
  5. Step 5: Solve for x
    x = 394,182,067,324.35/719,362.47
  6. Step 6: Final answer
    x = 547,960.29

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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.