Home / 717,811.56-990,544.19-395,469.63

Finding the Fourth Proportional to 717,811.56, 990,544.19 and 395,469.63

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Solution

The fourth proportional to 717,811.56, 990,544.19 and 395,469.63 is: 545,728.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,811.56 : 990,544.19 = 395,469.63 : x
  2. Step 2: Convert to fraction form
    717,811.56/990,544.19 = 395,469.63/x
  3. Step 3: Cross multiply
    717,811.56x = 990,544.19 × 395,469.63
  4. Step 4: Simplify right side
    717,811.56x = 391,730,142,340.60
  5. Step 5: Solve for x
    x = 391,730,142,340.60/717,811.56
  6. Step 6: Final answer
    x = 545,728.38

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Double scale
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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.