Home / 717,845.05-990,647.33-395,575.90

Finding the Fourth Proportional to 717,845.05, 990,647.33 and 395,575.90

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Solution

The fourth proportional to 717,845.05, 990,647.33 and 395,575.90 is: 545,906.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,845.05 : 990,647.33 = 395,575.90 : x
  2. Step 2: Convert to fraction form
    717,845.05/990,647.33 = 395,575.90/x
  3. Step 3: Cross multiply
    717,845.05x = 990,647.33 × 395,575.90
  4. Step 4: Simplify right side
    717,845.05x = 391,876,210,821.52
  5. Step 5: Solve for x
    x = 391,876,210,821.52/717,845.05
  6. Step 6: Final answer
    x = 545,906.41

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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.