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Finding the Fourth Proportional to 306,069.20, 459,103.80 and 212,757.20

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Solution

The fourth proportional to 306,069.20, 459,103.80 and 212,757.20 is: 319,135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,069.20 : 459,103.80 = 212,757.20 : x
  2. Step 2: Convert to fraction form
    306,069.20/459,103.80 = 212,757.20/x
  3. Step 3: Cross multiply
    306,069.20x = 459,103.80 × 212,757.20
  4. Step 4: Simplify right side
    306,069.20x = 97,677,638,997.36
  5. Step 5: Solve for x
    x = 97,677,638,997.36/306,069.20
  6. Step 6: Final answer
    x = 319,135.80

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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.