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Finding the Fourth Proportional to 528,230.49, 728,380.37 and 392,516.21

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Solution

The fourth proportional to 528,230.49, 728,380.37 and 392,516.21 is: 541,243.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,230.49 : 728,380.37 = 392,516.21 : x
  2. Step 2: Convert to fraction form
    528,230.49/728,380.37 = 392,516.21/x
  3. Step 3: Cross multiply
    528,230.49x = 728,380.37 × 392,516.21
  4. Step 4: Simplify right side
    528,230.49x = 285,901,096,666.32
  5. Step 5: Solve for x
    x = 285,901,096,666.32/528,230.49
  6. Step 6: Final answer
    x = 541,243.08

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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.