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Finding the Fourth Proportional to 715,877.97, 987,886.37 and 393,585.59

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Solution

The fourth proportional to 715,877.97, 987,886.37 and 393,585.59 is: 543,134.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,877.97 : 987,886.37 = 393,585.59 : x
  2. Step 2: Convert to fraction form
    715,877.97/987,886.37 = 393,585.59/x
  3. Step 3: Cross multiply
    715,877.97x = 987,886.37 × 393,585.59
  4. Step 4: Simplify right side
    715,877.97x = 388,817,839,789.41
  5. Step 5: Solve for x
    x = 388,817,839,789.41/715,877.97
  6. Step 6: Final answer
    x = 543,134.24

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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.