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Finding the Fourth Proportional to 717,958.35, 990,782.82 and 395,665.61

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Solution

The fourth proportional to 717,958.35, 990,782.82 and 395,665.61 is: 546,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,958.35 : 990,782.82 = 395,665.61 : x
  2. Step 2: Convert to fraction form
    717,958.35/990,782.82 = 395,665.61/x
  3. Step 3: Cross multiply
    717,958.35x = 990,782.82 × 395,665.61
  4. Step 4: Simplify right side
    717,958.35x = 392,018,683,898.91
  5. Step 5: Solve for x
    x = 392,018,683,898.91/717,958.35
  6. Step 6: Final answer
    x = 546,018.70

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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.