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Finding the Fourth Proportional to 717,371.16, 989,997.57 and 395,105.79

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Solution

The fourth proportional to 717,371.16, 989,997.57 and 395,105.79 is: 545,259.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,371.16 : 989,997.57 = 395,105.79 : x
  2. Step 2: Convert to fraction form
    717,371.16/989,997.57 = 395,105.79/x
  3. Step 3: Cross multiply
    717,371.16x = 989,997.57 × 395,105.79
  4. Step 4: Simplify right side
    717,371.16x = 391,153,771,992.93
  5. Step 5: Solve for x
    x = 391,153,771,992.93/717,371.16
  6. Step 6: Final answer
    x = 545,259.96

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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.