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Finding the Fourth Proportional to 257,440.80, 385,930.80 and 99,616.80

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Solution

The fourth proportional to 257,440.80, 385,930.80 and 99,616.80 is: 149,336.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,440.80 : 385,930.80 = 99,616.80 : x
  2. Step 2: Convert to fraction form
    257,440.80/385,930.80 = 99,616.80/x
  3. Step 3: Cross multiply
    257,440.80x = 385,930.80 × 99,616.80
  4. Step 4: Simplify right side
    257,440.80x = 38,445,191,317.44
  5. Step 5: Solve for x
    x = 38,445,191,317.44/257,440.80
  6. Step 6: Final answer
    x = 149,336.05

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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.