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Finding the Fourth Proportional to 651,193,203.60, 976,789,805.40 and 392,912,877.60

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Solution

The fourth proportional to 651,193,203.60, 976,789,805.40 and 392,912,877.60 is: 589,369,316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,193,203.60 : 976,789,805.40 = 392,912,877.60 : x
  2. Step 2: Convert to fraction form
    651,193,203.60/976,789,805.40 = 392,912,877.60/x
  3. Step 3: Cross multiply
    651,193,203.60x = 976,789,805.40 × 392,912,877.60
  4. Step 4: Simplify right side
    651,193,203.60x = 383,793,293,250,058,048
  5. Step 5: Solve for x
    x = 383,793,293,250,058,048/651,193,203.60
  6. Step 6: Final answer
    x = 589,369,316.40

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Double scale
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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.