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Finding the Fourth Proportional to 639,602.36, 882,648.80 and 353,120.34

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Solution

The fourth proportional to 639,602.36, 882,648.80 and 353,120.34 is: 487,304.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,602.36 : 882,648.80 = 353,120.34 : x
  2. Step 2: Convert to fraction form
    639,602.36/882,648.80 = 353,120.34/x
  3. Step 3: Cross multiply
    639,602.36x = 882,648.80 × 353,120.34
  4. Step 4: Simplify right side
    639,602.36x = 311,681,247,225.13
  5. Step 5: Solve for x
    x = 311,681,247,225.13/639,602.36
  6. Step 6: Final answer
    x = 487,304.72

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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.