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Finding the Fourth Proportional to 621,226.77, 930,888.90 and 418,069.86

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Solution

The fourth proportional to 621,226.77, 930,888.90 and 418,069.86 is: 626,464.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,226.77 : 930,888.90 = 418,069.86 : x
  2. Step 2: Convert to fraction form
    621,226.77/930,888.90 = 418,069.86/x
  3. Step 3: Cross multiply
    621,226.77x = 930,888.90 × 418,069.86
  4. Step 4: Simplify right side
    621,226.77x = 389,176,592,098.55
  5. Step 5: Solve for x
    x = 389,176,592,098.55/621,226.77
  6. Step 6: Final answer
    x = 626,464.62

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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.