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Finding the Fourth Proportional to 717,830.94, 990,650.20 and 395,540.65

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Solution

The fourth proportional to 717,830.94, 990,650.20 and 395,540.65 is: 545,870.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,830.94 : 990,650.20 = 395,540.65 : x
  2. Step 2: Convert to fraction form
    717,830.94/990,650.20 = 395,540.65/x
  3. Step 3: Cross multiply
    717,830.94x = 990,650.20 × 395,540.65
  4. Step 4: Simplify right side
    717,830.94x = 391,842,425,021.73
  5. Step 5: Solve for x
    x = 391,842,425,021.73/717,830.94
  6. Step 6: Final answer
    x = 545,870.07

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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.