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Finding the Fourth Proportional to 651,660.80, 977,491.20 and 539,686.40

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Solution

The fourth proportional to 651,660.80, 977,491.20 and 539,686.40 is: 809,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,660.80 : 977,491.20 = 539,686.40 : x
  2. Step 2: Convert to fraction form
    651,660.80/977,491.20 = 539,686.40/x
  3. Step 3: Cross multiply
    651,660.80x = 977,491.20 × 539,686.40
  4. Step 4: Simplify right side
    651,660.80x = 527,538,706,759.68
  5. Step 5: Solve for x
    x = 527,538,706,759.68/651,660.80
  6. Step 6: Final answer
    x = 809,529.60

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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.