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Finding the Fourth Proportional to 621,894.90, 931,347.46 and 354,845.80

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Solution

The fourth proportional to 621,894.90, 931,347.46 and 354,845.80 is: 531,415.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,894.90 : 931,347.46 = 354,845.80 : x
  2. Step 2: Convert to fraction form
    621,894.90/931,347.46 = 354,845.80/x
  3. Step 3: Cross multiply
    621,894.90x = 931,347.46 × 354,845.80
  4. Step 4: Simplify right side
    621,894.90x = 330,484,734,521.67
  5. Step 5: Solve for x
    x = 330,484,734,521.67/621,894.90
  6. Step 6: Final answer
    x = 531,415.73

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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.