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Finding the Fourth Proportional to 639,980.04, 883,155.52 and 353,493.96

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Solution

The fourth proportional to 639,980.04, 883,155.52 and 353,493.96 is: 487,812.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,980.04 : 883,155.52 = 353,493.96 : x
  2. Step 2: Convert to fraction form
    639,980.04/883,155.52 = 353,493.96/x
  3. Step 3: Cross multiply
    639,980.04x = 883,155.52 × 353,493.96
  4. Step 4: Simplify right side
    639,980.04x = 312,190,142,060.66
  5. Step 5: Solve for x
    x = 312,190,142,060.66/639,980.04
  6. Step 6: Final answer
    x = 487,812.31

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Double scale
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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.