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Finding the Fourth Proportional to 715,549.16, 987,481.51 and 393,270.68

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Solution

The fourth proportional to 715,549.16, 987,481.51 and 393,270.68 is: 542,726.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,549.16 : 987,481.51 = 393,270.68 : x
  2. Step 2: Convert to fraction form
    715,549.16/987,481.51 = 393,270.68/x
  3. Step 3: Cross multiply
    715,549.16x = 987,481.51 × 393,270.68
  4. Step 4: Simplify right side
    715,549.16x = 388,347,519,004.54
  5. Step 5: Solve for x
    x = 388,347,519,004.54/715,549.16
  6. Step 6: Final answer
    x = 542,726.54

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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.