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Finding the Fourth Proportional to 621,093.60, 931,640.40 and 432,136.80

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Solution

The fourth proportional to 621,093.60, 931,640.40 and 432,136.80 is: 648,205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,093.60 : 931,640.40 = 432,136.80 : x
  2. Step 2: Convert to fraction form
    621,093.60/931,640.40 = 432,136.80/x
  3. Step 3: Cross multiply
    621,093.60x = 931,640.40 × 432,136.80
  4. Step 4: Simplify right side
    621,093.60x = 402,596,101,206.72
  5. Step 5: Solve for x
    x = 402,596,101,206.72/621,093.60
  6. Step 6: Final answer
    x = 648,205.20

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Similar ratio
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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.