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Finding the Fourth Proportional to 539,541.80, 809,312.70 and 439,814.60

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Solution

The fourth proportional to 539,541.80, 809,312.70 and 439,814.60 is: 659,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,541.80 : 809,312.70 = 439,814.60 : x
  2. Step 2: Convert to fraction form
    539,541.80/809,312.70 = 439,814.60/x
  3. Step 3: Cross multiply
    539,541.80x = 809,312.70 × 439,814.60
  4. Step 4: Simplify right side
    539,541.80x = 355,947,541,425.42
  5. Step 5: Solve for x
    x = 355,947,541,425.42/539,541.80
  6. Step 6: Final answer
    x = 659,721.90

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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.