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Finding the Fourth Proportional to 579,628.40, 869,442.60 and 411,666.80

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Solution

The fourth proportional to 579,628.40, 869,442.60 and 411,666.80 is: 617,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,628.40 : 869,442.60 = 411,666.80 : x
  2. Step 2: Convert to fraction form
    579,628.40/869,442.60 = 411,666.80/x
  3. Step 3: Cross multiply
    579,628.40x = 869,442.60 × 411,666.80
  4. Step 4: Simplify right side
    579,628.40x = 357,920,652,925.68
  5. Step 5: Solve for x
    x = 357,920,652,925.68/579,628.40
  6. Step 6: Final answer
    x = 617,500.20

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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.