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Finding the Fourth Proportional to 693,638, 957,298.20 and 391,851.44

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Solution

The fourth proportional to 693,638, 957,298.20 and 391,851.44 is: 540,798.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,638 : 957,298.20 = 391,851.44 : x
  2. Step 2: Convert to fraction form
    693,638/957,298.20 = 391,851.44/x
  3. Step 3: Cross multiply
    693,638x = 957,298.20 × 391,851.44
  4. Step 4: Simplify right side
    693,638x = 375,118,678,179.41
  5. Step 5: Solve for x
    x = 375,118,678,179.41/693,638
  6. Step 6: Final answer
    x = 540,798.92

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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.