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Finding the Fourth Proportional to 717,459.30, 990,100.53 and 395,170.58

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Solution

The fourth proportional to 717,459.30, 990,100.53 and 395,170.58 is: 545,339.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,459.30 : 990,100.53 = 395,170.58 : x
  2. Step 2: Convert to fraction form
    717,459.30/990,100.53 = 395,170.58/x
  3. Step 3: Cross multiply
    717,459.30x = 990,100.53 × 395,170.58
  4. Step 4: Simplify right side
    717,459.30x = 391,258,600,698.41
  5. Step 5: Solve for x
    x = 391,258,600,698.41/717,459.30
  6. Step 6: Final answer
    x = 545,339.09

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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.