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Finding the Fourth Proportional to 611,581.60, 917,591.10 and 256,704.40

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Solution

The fourth proportional to 611,581.60, 917,591.10 and 256,704.40 is: 385,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,581.60 : 917,591.10 = 256,704.40 : x
  2. Step 2: Convert to fraction form
    611,581.60/917,591.10 = 256,704.40/x
  3. Step 3: Cross multiply
    611,581.60x = 917,591.10 × 256,704.40
  4. Step 4: Simplify right side
    611,581.60x = 235,549,672,770.84
  5. Step 5: Solve for x
    x = 235,549,672,770.84/611,581.60
  6. Step 6: Final answer
    x = 385,148.40

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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.