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Finding the Fourth Proportional to 719,065.86, 992,309.72 and 396,775.70

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Solution

The fourth proportional to 719,065.86, 992,309.72 and 396,775.70 is: 547,549.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,065.86 : 992,309.72 = 396,775.70 : x
  2. Step 2: Convert to fraction form
    719,065.86/992,309.72 = 396,775.70/x
  3. Step 3: Cross multiply
    719,065.86x = 992,309.72 × 396,775.70
  4. Step 4: Simplify right side
    719,065.86x = 393,724,383,769.80
  5. Step 5: Solve for x
    x = 393,724,383,769.80/719,065.86
  6. Step 6: Final answer
    x = 547,549.82

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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.