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Finding the Fourth Proportional to 518,074.70, 777,112.05 and 307,604.30

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Solution

The fourth proportional to 518,074.70, 777,112.05 and 307,604.30 is: 461,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,074.70 : 777,112.05 = 307,604.30 : x
  2. Step 2: Convert to fraction form
    518,074.70/777,112.05 = 307,604.30/x
  3. Step 3: Cross multiply
    518,074.70x = 777,112.05 × 307,604.30
  4. Step 4: Simplify right side
    518,074.70x = 239,043,008,161.82
  5. Step 5: Solve for x
    x = 239,043,008,161.82/518,074.70
  6. Step 6: Final answer
    x = 461,406.45

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Similar ratio
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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.