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Finding the Fourth Proportional to 419,423.59, 578,830.89 and 238,066.48

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Solution

The fourth proportional to 419,423.59, 578,830.89 and 238,066.48 is: 328,546.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,423.59 : 578,830.89 = 238,066.48 : x
  2. Step 2: Convert to fraction form
    419,423.59/578,830.89 = 238,066.48/x
  3. Step 3: Cross multiply
    419,423.59x = 578,830.89 × 238,066.48
  4. Step 4: Simplify right side
    419,423.59x = 137,800,232,497.57
  5. Step 5: Solve for x
    x = 137,800,232,497.57/419,423.59
  6. Step 6: Final answer
    x = 328,546.69

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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.