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Finding the Fourth Proportional to 257,000.40, 385,520.10 and 79,525.35

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Solution

The fourth proportional to 257,000.40, 385,520.10 and 79,525.35 is: 119,294.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,000.40 : 385,520.10 = 79,525.35 : x
  2. Step 2: Convert to fraction form
    257,000.40/385,520.10 = 79,525.35/x
  3. Step 3: Cross multiply
    257,000.40x = 385,520.10 × 79,525.35
  4. Step 4: Simplify right side
    257,000.40x = 30,658,620,884.54
  5. Step 5: Solve for x
    x = 30,658,620,884.54/257,000.40
  6. Step 6: Final answer
    x = 119,294.06

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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.