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Finding the Fourth Proportional to 618,421.99, 927,619.85 and 169,142.86

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Solution

The fourth proportional to 618,421.99, 927,619.85 and 169,142.86 is: 253,710.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,421.99 : 927,619.85 = 169,142.86 : x
  2. Step 2: Convert to fraction form
    618,421.99/927,619.85 = 169,142.86/x
  3. Step 3: Cross multiply
    618,421.99x = 927,619.85 × 169,142.86
  4. Step 4: Simplify right side
    618,421.99x = 156,900,272,443.79
  5. Step 5: Solve for x
    x = 156,900,272,443.79/618,421.99
  6. Step 6: Final answer
    x = 253,710.69

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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.