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Finding the Fourth Proportional to 579,930.40, 869,895.60 and 411,968.80

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Solution

The fourth proportional to 579,930.40, 869,895.60 and 411,968.80 is: 617,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,930.40 : 869,895.60 = 411,968.80 : x
  2. Step 2: Convert to fraction form
    579,930.40/869,895.60 = 411,968.80/x
  3. Step 3: Cross multiply
    579,930.40x = 869,895.60 × 411,968.80
  4. Step 4: Simplify right side
    579,930.40x = 358,369,846,457.28
  5. Step 5: Solve for x
    x = 358,369,846,457.28/579,930.40
  6. Step 6: Final answer
    x = 617,953.20

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Half scale
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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.