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Finding the Fourth Proportional to 519,621.60, 779,432.40 and 435,640.80

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Solution

The fourth proportional to 519,621.60, 779,432.40 and 435,640.80 is: 653,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,621.60 : 779,432.40 = 435,640.80 : x
  2. Step 2: Convert to fraction form
    519,621.60/779,432.40 = 435,640.80/x
  3. Step 3: Cross multiply
    519,621.60x = 779,432.40 × 435,640.80
  4. Step 4: Simplify right side
    519,621.60x = 339,552,554,281.92
  5. Step 5: Solve for x
    x = 339,552,554,281.92/519,621.60
  6. Step 6: Final answer
    x = 653,461.20

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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.