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Finding the Fourth Proportional to 717,453.72, 990,087.30 and 395,164.44

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Solution

The fourth proportional to 717,453.72, 990,087.30 and 395,164.44 is: 545,327.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,453.72 : 990,087.30 = 395,164.44 : x
  2. Step 2: Convert to fraction form
    717,453.72/990,087.30 = 395,164.44/x
  3. Step 3: Cross multiply
    717,453.72x = 990,087.30 × 395,164.44
  4. Step 4: Simplify right side
    717,453.72x = 391,247,293,455.61
  5. Step 5: Solve for x
    x = 391,247,293,455.61/717,453.72
  6. Step 6: Final answer
    x = 545,327.57

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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.