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Finding the Fourth Proportional to 715,825.60, 987,797.37 and 393,535.51

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Solution

The fourth proportional to 715,825.60, 987,797.37 and 393,535.51 is: 543,055.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,825.60 : 987,797.37 = 393,535.51 : x
  2. Step 2: Convert to fraction form
    715,825.60/987,797.37 = 393,535.51/x
  3. Step 3: Cross multiply
    715,825.60x = 987,797.37 × 393,535.51
  4. Step 4: Simplify right side
    715,825.60x = 388,733,341,779.61
  5. Step 5: Solve for x
    x = 388,733,341,779.61/715,825.60
  6. Step 6: Final answer
    x = 543,055.94

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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.