Home / 717,939.45-990,763.20-395,661.33

Finding the Fourth Proportional to 717,939.45, 990,763.20 and 395,661.33

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Solution

The fourth proportional to 717,939.45, 990,763.20 and 395,661.33 is: 546,016.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,939.45 : 990,763.20 = 395,661.33 : x
  2. Step 2: Convert to fraction form
    717,939.45/990,763.20 = 395,661.33/x
  3. Step 3: Cross multiply
    717,939.45x = 990,763.20 × 395,661.33
  4. Step 4: Simplify right side
    717,939.45x = 392,006,685,427.06
  5. Step 5: Solve for x
    x = 392,006,685,427.06/717,939.45
  6. Step 6: Final answer
    x = 546,016.36

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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.