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Finding the Fourth Proportional to 647,555.80, 971,333.70 and 579,904.60

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Solution

The fourth proportional to 647,555.80, 971,333.70 and 579,904.60 is: 869,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,555.80 : 971,333.70 = 579,904.60 : x
  2. Step 2: Convert to fraction form
    647,555.80/971,333.70 = 579,904.60/x
  3. Step 3: Cross multiply
    647,555.80x = 971,333.70 × 579,904.60
  4. Step 4: Simplify right side
    647,555.80x = 563,280,880,765.02
  5. Step 5: Solve for x
    x = 563,280,880,765.02/647,555.80
  6. Step 6: Final answer
    x = 869,856.90

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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.