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Finding the Fourth Proportional to 661,679.60, 993,503.55 and 512,088.80

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Solution

The fourth proportional to 661,679.60, 993,503.55 and 512,088.80 is: 768,894.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,679.60 : 993,503.55 = 512,088.80 : x
  2. Step 2: Convert to fraction form
    661,679.60/993,503.55 = 512,088.80/x
  3. Step 3: Cross multiply
    661,679.60x = 993,503.55 × 512,088.80
  4. Step 4: Simplify right side
    661,679.60x = 508,762,040,715.24
  5. Step 5: Solve for x
    x = 508,762,040,715.24/661,679.60
  6. Step 6: Final answer
    x = 768,894.86

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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.