Home / 715,896.77-987,938.17-393,612.35

Finding the Fourth Proportional to 715,896.77, 987,938.17 and 393,612.35

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Solution

The fourth proportional to 715,896.77, 987,938.17 and 393,612.35 is: 543,185.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,896.77 : 987,938.17 = 393,612.35 : x
  2. Step 2: Convert to fraction form
    715,896.77/987,938.17 = 393,612.35/x
  3. Step 3: Cross multiply
    715,896.77x = 987,938.17 × 393,612.35
  4. Step 4: Simplify right side
    715,896.77x = 388,864,658,824.68
  5. Step 5: Solve for x
    x = 388,864,658,824.68/715,896.77
  6. Step 6: Final answer
    x = 543,185.38

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Double scale
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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.