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Finding the Fourth Proportional to 406,378.31, 561,073.28 and 253,477.85

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Solution

The fourth proportional to 406,378.31, 561,073.28 and 253,477.85 is: 349,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,378.31 : 561,073.28 = 253,477.85 : x
  2. Step 2: Convert to fraction form
    406,378.31/561,073.28 = 253,477.85/x
  3. Step 3: Cross multiply
    406,378.31x = 561,073.28 × 253,477.85
  4. Step 4: Simplify right side
    406,378.31x = 142,219,644,634.09
  5. Step 5: Solve for x
    x = 142,219,644,634.09/406,378.31
  6. Step 6: Final answer
    x = 349,968.60

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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.