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Finding the Fourth Proportional to 693,640, 957,300.96 and 391,853.44

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Solution

The fourth proportional to 693,640, 957,300.96 and 391,853.44 is: 540,801.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,640 : 957,300.96 = 391,853.44 : x
  2. Step 2: Convert to fraction form
    693,640/957,300.96 = 391,853.44/x
  3. Step 3: Cross multiply
    693,640x = 957,300.96 × 391,853.44
  4. Step 4: Simplify right side
    693,640x = 375,121,674,291.30
  5. Step 5: Solve for x
    x = 375,121,674,291.30/693,640
  6. Step 6: Final answer
    x = 540,801.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.