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Finding the Fourth Proportional to 436,291.20, 654,436.80 and 430,070.40

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Solution

The fourth proportional to 436,291.20, 654,436.80 and 430,070.40 is: 645,105.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,291.20 : 654,436.80 = 430,070.40 : x
  2. Step 2: Convert to fraction form
    436,291.20/654,436.80 = 430,070.40/x
  3. Step 3: Cross multiply
    436,291.20x = 654,436.80 × 430,070.40
  4. Step 4: Simplify right side
    436,291.20x = 281,453,896,350.72
  5. Step 5: Solve for x
    x = 281,453,896,350.72/436,291.20
  6. Step 6: Final answer
    x = 645,105.60

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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.