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Finding the Fourth Proportional to 520,134.15, 778,889.03 and 415,158.15

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Solution

The fourth proportional to 520,134.15, 778,889.03 and 415,158.15 is: 621,689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,134.15 : 778,889.03 = 415,158.15 : x
  2. Step 2: Convert to fraction form
    520,134.15/778,889.03 = 415,158.15/x
  3. Step 3: Cross multiply
    520,134.15x = 778,889.03 × 415,158.15
  4. Step 4: Simplify right side
    520,134.15x = 323,362,126,674.30
  5. Step 5: Solve for x
    x = 323,362,126,674.30/520,134.15
  6. Step 6: Final answer
    x = 621,689.86

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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.