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Finding the Fourth Proportional to 539,386.60, 809,274.30 and 519,946.60

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Solution

The fourth proportional to 539,386.60, 809,274.30 and 519,946.60 is: 780,107.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,386.60 : 809,274.30 = 519,946.60 : x
  2. Step 2: Convert to fraction form
    539,386.60/809,274.30 = 519,946.60/x
  3. Step 3: Cross multiply
    539,386.60x = 809,274.30 × 519,946.60
  4. Step 4: Simplify right side
    539,386.60x = 420,779,420,752.38
  5. Step 5: Solve for x
    x = 420,779,420,752.38/539,386.60
  6. Step 6: Final answer
    x = 780,107.29

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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.