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Finding the Fourth Proportional to 539,591.30, 809,386.95 and 287,648.90

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Solution

The fourth proportional to 539,591.30, 809,386.95 and 287,648.90 is: 431,473.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,591.30 : 809,386.95 = 287,648.90 : x
  2. Step 2: Convert to fraction form
    539,591.30/809,386.95 = 287,648.90/x
  3. Step 3: Cross multiply
    539,591.30x = 809,386.95 × 287,648.90
  4. Step 4: Simplify right side
    539,591.30x = 232,819,265,841.86
  5. Step 5: Solve for x
    x = 232,819,265,841.86/539,591.30
  6. Step 6: Final answer
    x = 431,473.35

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Double scale
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Similar ratio
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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.