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Finding the Fourth Proportional to 515,126.21, 710,917.84 and 285,757.39

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Solution

The fourth proportional to 515,126.21, 710,917.84 and 285,757.39 is: 394,369.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,126.21 : 710,917.84 = 285,757.39 : x
  2. Step 2: Convert to fraction form
    515,126.21/710,917.84 = 285,757.39/x
  3. Step 3: Cross multiply
    515,126.21x = 710,917.84 × 285,757.39
  4. Step 4: Simplify right side
    515,126.21x = 203,150,024,405.67
  5. Step 5: Solve for x
    x = 203,150,024,405.67/515,126.21
  6. Step 6: Final answer
    x = 394,369.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.