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Finding the Fourth Proportional to 512,416.60, 768,624.90 and 487,922.20

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Solution

The fourth proportional to 512,416.60, 768,624.90 and 487,922.20 is: 731,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,416.60 : 768,624.90 = 487,922.20 : x
  2. Step 2: Convert to fraction form
    512,416.60/768,624.90 = 487,922.20/x
  3. Step 3: Cross multiply
    512,416.60x = 768,624.90 × 487,922.20
  4. Step 4: Simplify right side
    512,416.60x = 375,029,152,182.78
  5. Step 5: Solve for x
    x = 375,029,152,182.78/512,416.60
  6. Step 6: Final answer
    x = 731,883.30

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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.