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Finding the Fourth Proportional to 663,000.80, 994,501.20 and 411,058.40

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Solution

The fourth proportional to 663,000.80, 994,501.20 and 411,058.40 is: 616,587.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,000.80 : 994,501.20 = 411,058.40 : x
  2. Step 2: Convert to fraction form
    663,000.80/994,501.20 = 411,058.40/x
  3. Step 3: Cross multiply
    663,000.80x = 994,501.20 × 411,058.40
  4. Step 4: Simplify right side
    663,000.80x = 408,798,072,070.08
  5. Step 5: Solve for x
    x = 408,798,072,070.08/663,000.80
  6. Step 6: Final answer
    x = 616,587.60

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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.