Home / 715,884.55-987,895.42-393,592.17

Finding the Fourth Proportional to 715,884.55, 987,895.42 and 393,592.17

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Solution

The fourth proportional to 715,884.55, 987,895.42 and 393,592.17 is: 543,143.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,884.55 : 987,895.42 = 393,592.17 : x
  2. Step 2: Convert to fraction form
    715,884.55/987,895.42 = 393,592.17/x
  3. Step 3: Cross multiply
    715,884.55x = 987,895.42 × 393,592.17
  4. Step 4: Simplify right side
    715,884.55x = 388,827,902,090.86
  5. Step 5: Solve for x
    x = 388,827,902,090.86/715,884.55
  6. Step 6: Final answer
    x = 543,143.31

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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.