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Finding the Fourth Proportional to 579,385.70, 869,078.55 and 411,424.10

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Solution

The fourth proportional to 579,385.70, 869,078.55 and 411,424.10 is: 617,136.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,385.70 : 869,078.55 = 411,424.10 : x
  2. Step 2: Convert to fraction form
    579,385.70/869,078.55 = 411,424.10/x
  3. Step 3: Cross multiply
    579,385.70x = 869,078.55 × 411,424.10
  4. Step 4: Simplify right side
    579,385.70x = 357,559,860,263.06
  5. Step 5: Solve for x
    x = 357,559,860,263.06/579,385.70
  6. Step 6: Final answer
    x = 617,136.15

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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.