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Finding the Fourth Proportional to 693,408.74, 956,619.11 and 421,432.81

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Solution

The fourth proportional to 693,408.74, 956,619.11 and 421,432.81 is: 581,404.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,408.74 : 956,619.11 = 421,432.81 : x
  2. Step 2: Convert to fraction form
    693,408.74/956,619.11 = 421,432.81/x
  3. Step 3: Cross multiply
    693,408.74x = 956,619.11 × 421,432.81
  4. Step 4: Simplify right side
    693,408.74x = 403,150,678,289.03
  5. Step 5: Solve for x
    x = 403,150,678,289.03/693,408.74
  6. Step 6: Final answer
    x = 581,404.10

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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.