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Finding the Fourth Proportional to 712,540.89, 983,376.78 and 406,662.97

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Solution

The fourth proportional to 712,540.89, 983,376.78 and 406,662.97 is: 561,235.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,540.89 : 983,376.78 = 406,662.97 : x
  2. Step 2: Convert to fraction form
    712,540.89/983,376.78 = 406,662.97/x
  3. Step 3: Cross multiply
    712,540.89x = 983,376.78 × 406,662.97
  4. Step 4: Simplify right side
    712,540.89x = 399,902,917,650.36
  5. Step 5: Solve for x
    x = 399,902,917,650.36/712,540.89
  6. Step 6: Final answer
    x = 561,235.05

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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.