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Finding the Fourth Proportional to 715,908.16, 987,926.69 and 393,599.04

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Solution

The fourth proportional to 715,908.16, 987,926.69 and 393,599.04 is: 543,152.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,908.16 : 987,926.69 = 393,599.04 : x
  2. Step 2: Convert to fraction form
    715,908.16/987,926.69 = 393,599.04/x
  3. Step 3: Cross multiply
    715,908.16x = 987,926.69 × 393,599.04
  4. Step 4: Simplify right side
    715,908.16x = 388,846,996,774.38
  5. Step 5: Solve for x
    x = 388,846,996,774.38/715,908.16
  6. Step 6: Final answer
    x = 543,152.07

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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.