Home / 717,961.56-990,774.78-395,664.78

Finding the Fourth Proportional to 717,961.56, 990,774.78 and 395,664.78

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Solution

The fourth proportional to 717,961.56, 990,774.78 and 395,664.78 is: 546,010.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,961.56 : 990,774.78 = 395,664.78 : x
  2. Step 2: Convert to fraction form
    717,961.56/990,774.78 = 395,664.78/x
  3. Step 3: Cross multiply
    717,961.56x = 990,774.78 × 395,664.78
  4. Step 4: Simplify right side
    717,961.56x = 392,014,685,358.25
  5. Step 5: Solve for x
    x = 392,014,685,358.25/717,961.56
  6. Step 6: Final answer
    x = 546,010.69

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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.