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Finding the Fourth Proportional to 651,790.80, 977,686.20 and 539,816.40

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Solution

The fourth proportional to 651,790.80, 977,686.20 and 539,816.40 is: 809,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,790.80 : 977,686.20 = 539,816.40 : x
  2. Step 2: Convert to fraction form
    651,790.80/977,686.20 = 539,816.40/x
  3. Step 3: Cross multiply
    651,790.80x = 977,686.20 × 539,816.40
  4. Step 4: Simplify right side
    651,790.80x = 527,771,044,813.68
  5. Step 5: Solve for x
    x = 527,771,044,813.68/651,790.80
  6. Step 6: Final answer
    x = 809,724.60

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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.