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Finding the Fourth Proportional to 259,511.60, 389,267.40 and 256,012.40

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Solution

The fourth proportional to 259,511.60, 389,267.40 and 256,012.40 is: 384,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,511.60 : 389,267.40 = 256,012.40 : x
  2. Step 2: Convert to fraction form
    259,511.60/389,267.40 = 256,012.40/x
  3. Step 3: Cross multiply
    259,511.60x = 389,267.40 × 256,012.40
  4. Step 4: Simplify right side
    259,511.60x = 99,657,281,315.76
  5. Step 5: Solve for x
    x = 99,657,281,315.76/259,511.60
  6. Step 6: Final answer
    x = 384,018.60

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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.