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Finding the Fourth Proportional to 719,330.78, 992,676.57 and 397,040.97

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Solution

The fourth proportional to 719,330.78, 992,676.57 and 397,040.97 is: 547,916.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,330.78 : 992,676.57 = 397,040.97 : x
  2. Step 2: Convert to fraction form
    719,330.78/992,676.57 = 397,040.97/x
  3. Step 3: Cross multiply
    719,330.78x = 992,676.57 × 397,040.97
  4. Step 4: Simplify right side
    719,330.78x = 394,133,262,107.00
  5. Step 5: Solve for x
    x = 394,133,262,107.00/719,330.78
  6. Step 6: Final answer
    x = 547,916.58

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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.