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Finding the Fourth Proportional to 611,606.40, 917,081.55 and 256,218.90

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Solution

The fourth proportional to 611,606.40, 917,081.55 and 256,218.90 is: 384,190.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,606.40 : 917,081.55 = 256,218.90 : x
  2. Step 2: Convert to fraction form
    611,606.40/917,081.55 = 256,218.90/x
  3. Step 3: Cross multiply
    611,606.40x = 917,081.55 × 256,218.90
  4. Step 4: Simplify right side
    611,606.40x = 234,973,625,951.30
  5. Step 5: Solve for x
    x = 234,973,625,951.30/611,606.40
  6. Step 6: Final answer
    x = 384,190.92

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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.