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Finding the Fourth Proportional to 399,980.56, 599,970.88 and 276,108.88

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Solution

The fourth proportional to 399,980.56, 599,970.88 and 276,108.88 is: 414,163.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,980.56 : 599,970.88 = 276,108.88 : x
  2. Step 2: Convert to fraction form
    399,980.56/599,970.88 = 276,108.88/x
  3. Step 3: Cross multiply
    399,980.56x = 599,970.88 × 276,108.88
  4. Step 4: Simplify right side
    399,980.56x = 165,657,287,709.41
  5. Step 5: Solve for x
    x = 165,657,287,709.41/399,980.56
  6. Step 6: Final answer
    x = 414,163.35

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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.