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Finding the Fourth Proportional to 257,234.80, 385,852.20 and 70,246.30

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Solution

The fourth proportional to 257,234.80, 385,852.20 and 70,246.30 is: 105,369.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,234.80 : 385,852.20 = 70,246.30 : x
  2. Step 2: Convert to fraction form
    257,234.80/385,852.20 = 70,246.30/x
  3. Step 3: Cross multiply
    257,234.80x = 385,852.20 × 70,246.30
  4. Step 4: Simplify right side
    257,234.80x = 27,104,689,396.86
  5. Step 5: Solve for x
    x = 27,104,689,396.86/257,234.80
  6. Step 6: Final answer
    x = 105,369.45

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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.