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Finding the Fourth Proportional to 611,408.60, 917,331.60 and 256,531.40

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Solution

The fourth proportional to 611,408.60, 917,331.60 and 256,531.40 is: 384,888.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,408.60 : 917,331.60 = 256,531.40 : x
  2. Step 2: Convert to fraction form
    611,408.60/917,331.60 = 256,531.40/x
  3. Step 3: Cross multiply
    611,408.60x = 917,331.60 × 256,531.40
  4. Step 4: Simplify right side
    611,408.60x = 235,324,359,612.24
  5. Step 5: Solve for x
    x = 235,324,359,612.24/611,408.60
  6. Step 6: Final answer
    x = 384,888.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.