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Finding the Fourth Proportional to 704,769.21, 972,567.69 and 398,839.92

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Solution

The fourth proportional to 704,769.21, 972,567.69 and 398,839.92 is: 550,391.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,769.21 : 972,567.69 = 398,839.92 : x
  2. Step 2: Convert to fraction form
    704,769.21/972,567.69 = 398,839.92/x
  3. Step 3: Cross multiply
    704,769.21x = 972,567.69 × 398,839.92
  4. Step 4: Simplify right side
    704,769.21x = 387,898,819,674.19
  5. Step 5: Solve for x
    x = 387,898,819,674.19/704,769.21
  6. Step 6: Final answer
    x = 550,391.27

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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.