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Finding the Fourth Proportional to 639,065.16, 885,638.01 and 630,045

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Solution

The fourth proportional to 639,065.16, 885,638.01 and 630,045 is: 873,137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,065.16 : 885,638.01 = 630,045 : x
  2. Step 2: Convert to fraction form
    639,065.16/885,638.01 = 630,045/x
  3. Step 3: Cross multiply
    639,065.16x = 885,638.01 × 630,045
  4. Step 4: Simplify right side
    639,065.16x = 557,991,800,010.45
  5. Step 5: Solve for x
    x = 557,991,800,010.45/639,065.16
  6. Step 6: Final answer
    x = 873,137.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.