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Finding the Fourth Proportional to 856,573.60, 1,284,860.40 and 265,520.80

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Solution

The fourth proportional to 856,573.60, 1,284,860.40 and 265,520.80 is: 398,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,573.60 : 1,284,860.40 = 265,520.80 : x
  2. Step 2: Convert to fraction form
    856,573.60/1,284,860.40 = 265,520.80/x
  3. Step 3: Cross multiply
    856,573.60x = 1,284,860.40 × 265,520.80
  4. Step 4: Simplify right side
    856,573.60x = 341,157,161,296.32
  5. Step 5: Solve for x
    x = 341,157,161,296.32/856,573.60
  6. Step 6: Final answer
    x = 398,281.20

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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.