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Finding the Fourth Proportional to 319,422.60, 478,826.70 and 248,305.80

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Solution

The fourth proportional to 319,422.60, 478,826.70 and 248,305.80 is: 372,219.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,422.60 : 478,826.70 = 248,305.80 : x
  2. Step 2: Convert to fraction form
    319,422.60/478,826.70 = 248,305.80/x
  3. Step 3: Cross multiply
    319,422.60x = 478,826.70 × 248,305.80
  4. Step 4: Simplify right side
    319,422.60x = 118,895,446,804.86
  5. Step 5: Solve for x
    x = 118,895,446,804.86/319,422.60
  6. Step 6: Final answer
    x = 372,219.90

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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.