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Finding the Fourth Proportional to 610,266.90, 915,400.35 and 411,201.30

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Solution

The fourth proportional to 610,266.90, 915,400.35 and 411,201.30 is: 616,801.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,266.90 : 915,400.35 = 411,201.30 : x
  2. Step 2: Convert to fraction form
    610,266.90/915,400.35 = 411,201.30/x
  3. Step 3: Cross multiply
    610,266.90x = 915,400.35 × 411,201.30
  4. Step 4: Simplify right side
    610,266.90x = 376,413,813,940.46
  5. Step 5: Solve for x
    x = 376,413,813,940.46/610,266.90
  6. Step 6: Final answer
    x = 616,801.95

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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.