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Finding the Fourth Proportional to 551,578.05, 761,266.31 and 515,558.16

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Solution

The fourth proportional to 551,578.05, 761,266.31 and 515,558.16 is: 711,553.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,578.05 : 761,266.31 = 515,558.16 : x
  2. Step 2: Convert to fraction form
    551,578.05/761,266.31 = 515,558.16/x
  3. Step 3: Cross multiply
    551,578.05x = 761,266.31 × 515,558.16
  4. Step 4: Simplify right side
    551,578.05x = 392,477,055,475.80
  5. Step 5: Solve for x
    x = 392,477,055,475.80/551,578.05
  6. Step 6: Final answer
    x = 711,553.07

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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.