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Finding the Fourth Proportional to 283,408.79, 391,121.80 and 156,084.35

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Solution

The fourth proportional to 283,408.79, 391,121.80 and 156,084.35 is: 215,406.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,408.79 : 391,121.80 = 156,084.35 : x
  2. Step 2: Convert to fraction form
    283,408.79/391,121.80 = 156,084.35/x
  3. Step 3: Cross multiply
    283,408.79x = 391,121.80 × 156,084.35
  4. Step 4: Simplify right side
    283,408.79x = 61,047,989,578.01
  5. Step 5: Solve for x
    x = 61,047,989,578.01/283,408.79
  6. Step 6: Final answer
    x = 215,406.13

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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.