Home / 715,795.23-987,816.29-393,513.45

Finding the Fourth Proportional to 715,795.23, 987,816.29 and 393,513.45

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Solution

The fourth proportional to 715,795.23, 987,816.29 and 393,513.45 is: 543,058.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,795.23 : 987,816.29 = 393,513.45 : x
  2. Step 2: Convert to fraction form
    715,795.23/987,816.29 = 393,513.45/x
  3. Step 3: Cross multiply
    715,795.23x = 987,816.29 × 393,513.45
  4. Step 4: Simplify right side
    715,795.23x = 388,718,996,244.10
  5. Step 5: Solve for x
    x = 388,718,996,244.10/715,795.23
  6. Step 6: Final answer
    x = 543,058.94

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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.