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Finding the Fourth Proportional to 571,808.90, 857,713.35 and 256,880.90

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Solution

The fourth proportional to 571,808.90, 857,713.35 and 256,880.90 is: 385,321.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,808.90 : 857,713.35 = 256,880.90 : x
  2. Step 2: Convert to fraction form
    571,808.90/857,713.35 = 256,880.90/x
  3. Step 3: Cross multiply
    571,808.90x = 857,713.35 × 256,880.90
  4. Step 4: Simplify right side
    571,808.90x = 220,330,177,290.02
  5. Step 5: Solve for x
    x = 220,330,177,290.02/571,808.90
  6. Step 6: Final answer
    x = 385,321.35

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Half scale
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Double scale
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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.