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Finding the Fourth Proportional to 418,860.83, 578,228.71 and 257,853.89

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Solution

The fourth proportional to 418,860.83, 578,228.71 and 257,853.89 is: 355,961.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,860.83 : 578,228.71 = 257,853.89 : x
  2. Step 2: Convert to fraction form
    418,860.83/578,228.71 = 257,853.89/x
  3. Step 3: Cross multiply
    418,860.83x = 578,228.71 × 257,853.89
  4. Step 4: Simplify right side
    418,860.83x = 149,098,522,183.18
  5. Step 5: Solve for x
    x = 149,098,522,183.18/418,860.83
  6. Step 6: Final answer
    x = 355,961.96

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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.