Home / 513,583.90-768,917.85-485,655.10

Finding the Fourth Proportional to 513,583.90, 768,917.85 and 485,655.10

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Solution

The fourth proportional to 513,583.90, 768,917.85 and 485,655.10 is: 727,103.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,583.90 : 768,917.85 = 485,655.10 : x
  2. Step 2: Convert to fraction form
    513,583.90/768,917.85 = 485,655.10/x
  3. Step 3: Cross multiply
    513,583.90x = 768,917.85 × 485,655.10
  4. Step 4: Simplify right side
    513,583.90x = 373,428,875,333.54
  5. Step 5: Solve for x
    x = 373,428,875,333.54/513,583.90
  6. Step 6: Final answer
    x = 727,103.94

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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.