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Finding the Fourth Proportional to 605,123.60, 907,685.40 and 539,805.20

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Solution

The fourth proportional to 605,123.60, 907,685.40 and 539,805.20 is: 809,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,123.60 : 907,685.40 = 539,805.20 : x
  2. Step 2: Convert to fraction form
    605,123.60/907,685.40 = 539,805.20/x
  3. Step 3: Cross multiply
    605,123.60x = 907,685.40 × 539,805.20
  4. Step 4: Simplify right side
    605,123.60x = 489,973,298,884.08
  5. Step 5: Solve for x
    x = 489,973,298,884.08/605,123.60
  6. Step 6: Final answer
    x = 809,707.80

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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.