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Finding the Fourth Proportional to 513,498.40, 768,789.60 and 485,569.60

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Solution

The fourth proportional to 513,498.40, 768,789.60 and 485,569.60 is: 726,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,498.40 : 768,789.60 = 485,569.60 : x
  2. Step 2: Convert to fraction form
    513,498.40/768,789.60 = 485,569.60/x
  3. Step 3: Cross multiply
    513,498.40x = 768,789.60 × 485,569.60
  4. Step 4: Simplify right side
    513,498.40x = 373,300,858,556.16
  5. Step 5: Solve for x
    x = 373,300,858,556.16/513,498.40
  6. Step 6: Final answer
    x = 726,975.70

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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.