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Finding the Fourth Proportional to 716,242.56, 988,415.64 and 393,953.28

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Solution

The fourth proportional to 716,242.56, 988,415.64 and 393,953.28 is: 543,656.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,242.56 : 988,415.64 = 393,953.28 : x
  2. Step 2: Convert to fraction form
    716,242.56/988,415.64 = 393,953.28/x
  3. Step 3: Cross multiply
    716,242.56x = 988,415.64 × 393,953.28
  4. Step 4: Simplify right side
    716,242.56x = 389,389,583,381.30
  5. Step 5: Solve for x
    x = 389,389,583,381.30/716,242.56
  6. Step 6: Final answer
    x = 543,656.03

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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.