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Finding the Fourth Proportional to 439,853.42, 606,961.40 and 258,573

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Solution

The fourth proportional to 439,853.42, 606,961.40 and 258,573 is: 356,809.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,853.42 : 606,961.40 = 258,573 : x
  2. Step 2: Convert to fraction form
    439,853.42/606,961.40 = 258,573/x
  3. Step 3: Cross multiply
    439,853.42x = 606,961.40 × 258,573
  4. Step 4: Simplify right side
    439,853.42x = 156,943,830,082.20
  5. Step 5: Solve for x
    x = 156,943,830,082.20/439,853.42
  6. Step 6: Final answer
    x = 356,809.39

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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.