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Finding the Fourth Proportional to 715,583.73, 987,507.69 and 393,326.85

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Solution

The fourth proportional to 715,583.73, 987,507.69 and 393,326.85 is: 542,792.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,583.73 : 987,507.69 = 393,326.85 : x
  2. Step 2: Convert to fraction form
    715,583.73/987,507.69 = 393,326.85/x
  3. Step 3: Cross multiply
    715,583.73x = 987,507.69 × 393,326.85
  4. Step 4: Simplify right side
    715,583.73x = 388,413,289,058.48
  5. Step 5: Solve for x
    x = 388,413,289,058.48/715,583.73
  6. Step 6: Final answer
    x = 542,792.23

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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.