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Finding the Fourth Proportional to 528,039.80, 791,541.30 and 261,841.40

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Solution

The fourth proportional to 528,039.80, 791,541.30 and 261,841.40 is: 392,505.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,039.80 : 791,541.30 = 261,841.40 : x
  2. Step 2: Convert to fraction form
    528,039.80/791,541.30 = 261,841.40/x
  3. Step 3: Cross multiply
    528,039.80x = 791,541.30 × 261,841.40
  4. Step 4: Simplify right side
    528,039.80x = 207,258,282,149.82
  5. Step 5: Solve for x
    x = 207,258,282,149.82/528,039.80
  6. Step 6: Final answer
    x = 392,505.04

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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.