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Finding the Fourth Proportional to 306,486.88, 459,738 and 84,872.80

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Solution

The fourth proportional to 306,486.88, 459,738 and 84,872.80 is: 127,311.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,486.88 : 459,738 = 84,872.80 : x
  2. Step 2: Convert to fraction form
    306,486.88/459,738 = 84,872.80/x
  3. Step 3: Cross multiply
    306,486.88x = 459,738 × 84,872.80
  4. Step 4: Simplify right side
    306,486.88x = 39,019,251,326.40
  5. Step 5: Solve for x
    x = 39,019,251,326.40/306,486.88
  6. Step 6: Final answer
    x = 127,311.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.