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Finding the Fourth Proportional to 639,495.60, 882,480.60 and 353,014.80

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Solution

The fourth proportional to 639,495.60, 882,480.60 and 353,014.80 is: 487,147.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,495.60 : 882,480.60 = 353,014.80 : x
  2. Step 2: Convert to fraction form
    639,495.60/882,480.60 = 353,014.80/x
  3. Step 3: Cross multiply
    639,495.60x = 882,480.60 × 353,014.80
  4. Step 4: Simplify right side
    639,495.60x = 311,528,712,512.88
  5. Step 5: Solve for x
    x = 311,528,712,512.88/639,495.60
  6. Step 6: Final answer
    x = 487,147.55

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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.