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Finding the Fourth Proportional to 611,590.60, 917,385.90 and 256,859.20

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Solution

The fourth proportional to 611,590.60, 917,385.90 and 256,859.20 is: 385,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,590.60 : 917,385.90 = 256,859.20 : x
  2. Step 2: Convert to fraction form
    611,590.60/917,385.90 = 256,859.20/x
  3. Step 3: Cross multiply
    611,590.60x = 917,385.90 × 256,859.20
  4. Step 4: Simplify right side
    611,590.60x = 235,639,008,365.28
  5. Step 5: Solve for x
    x = 235,639,008,365.28/611,590.60
  6. Step 6: Final answer
    x = 385,288.80

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Similar ratio
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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.