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Finding the Fourth Proportional to 717,469.21, 990,107.44 and 395,179.32

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Solution

The fourth proportional to 717,469.21, 990,107.44 and 395,179.32 is: 545,347.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,469.21 : 990,107.44 = 395,179.32 : x
  2. Step 2: Convert to fraction form
    717,469.21/990,107.44 = 395,179.32/x
  3. Step 3: Cross multiply
    717,469.21x = 990,107.44 × 395,179.32
  4. Step 4: Simplify right side
    717,469.21x = 391,269,977,939.71
  5. Step 5: Solve for x
    x = 391,269,977,939.71/717,469.21
  6. Step 6: Final answer
    x = 545,347.41

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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.