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Finding the Fourth Proportional to 262,607.80, 393,911.70 and 172,406.20

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Solution

The fourth proportional to 262,607.80, 393,911.70 and 172,406.20 is: 258,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,607.80 : 393,911.70 = 172,406.20 : x
  2. Step 2: Convert to fraction form
    262,607.80/393,911.70 = 172,406.20/x
  3. Step 3: Cross multiply
    262,607.80x = 393,911.70 × 172,406.20
  4. Step 4: Simplify right side
    262,607.80x = 67,912,819,332.54
  5. Step 5: Solve for x
    x = 67,912,819,332.54/262,607.80
  6. Step 6: Final answer
    x = 258,609.30

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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.