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Finding the Fourth Proportional to 716,115.74, 988,219.98 and 393,825.83

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Solution

The fourth proportional to 716,115.74, 988,219.98 and 393,825.83 is: 543,468.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,115.74 : 988,219.98 = 393,825.83 : x
  2. Step 2: Convert to fraction form
    716,115.74/988,219.98 = 393,825.83/x
  3. Step 3: Cross multiply
    716,115.74x = 988,219.98 × 393,825.83
  4. Step 4: Simplify right side
    716,115.74x = 389,186,548,904.98
  5. Step 5: Solve for x
    x = 389,186,548,904.98/716,115.74
  6. Step 6: Final answer
    x = 543,468.79

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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.