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Finding the Fourth Proportional to 543,840.72, 815,777.16 and 259,561.23

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Solution

The fourth proportional to 543,840.72, 815,777.16 and 259,561.23 is: 389,349.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,840.72 : 815,777.16 = 259,561.23 : x
  2. Step 2: Convert to fraction form
    543,840.72/815,777.16 = 259,561.23/x
  3. Step 3: Cross multiply
    543,840.72x = 815,777.16 × 259,561.23
  4. Step 4: Simplify right side
    543,840.72x = 211,744,123,055.51
  5. Step 5: Solve for x
    x = 211,744,123,055.51/543,840.72
  6. Step 6: Final answer
    x = 389,349.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.