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Finding the Fourth Proportional to 717,321.72, 989,906.94 and 411,409.92

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Solution

The fourth proportional to 717,321.72, 989,906.94 and 411,409.92 is: 567,747.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,321.72 : 989,906.94 = 411,409.92 : x
  2. Step 2: Convert to fraction form
    717,321.72/989,906.94 = 411,409.92/x
  3. Step 3: Cross multiply
    717,321.72x = 989,906.94 × 411,409.92
  4. Step 4: Simplify right side
    717,321.72x = 407,257,534,992.85
  5. Step 5: Solve for x
    x = 407,257,534,992.85/717,321.72
  6. Step 6: Final answer
    x = 567,747.39

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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.