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Finding the Fourth Proportional to 704,859.96, 972,721.25 and 398,936.32

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Solution

The fourth proportional to 704,859.96, 972,721.25 and 398,936.32 is: 550,540.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,859.96 : 972,721.25 = 398,936.32 : x
  2. Step 2: Convert to fraction form
    704,859.96/972,721.25 = 398,936.32/x
  3. Step 3: Cross multiply
    704,859.96x = 972,721.25 × 398,936.32
  4. Step 4: Simplify right side
    704,859.96x = 388,053,835,860.80
  5. Step 5: Solve for x
    x = 388,053,835,860.80/704,859.96
  6. Step 6: Final answer
    x = 550,540.33

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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.