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Finding the Fourth Proportional to 539,590.80, 809,386.20 and 287,648.40

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Solution

The fourth proportional to 539,590.80, 809,386.20 and 287,648.40 is: 431,472.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,590.80 : 809,386.20 = 287,648.40 : x
  2. Step 2: Convert to fraction form
    539,590.80/809,386.20 = 287,648.40/x
  3. Step 3: Cross multiply
    539,590.80x = 809,386.20 × 287,648.40
  4. Step 4: Simplify right side
    539,590.80x = 232,818,645,412.08
  5. Step 5: Solve for x
    x = 232,818,645,412.08/539,590.80
  6. Step 6: Final answer
    x = 431,472.60

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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.