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Finding the Fourth Proportional to 485,889.60, 729,036 and 219,466.56

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Solution

The fourth proportional to 485,889.60, 729,036 and 219,466.56 is: 329,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,889.60 : 729,036 = 219,466.56 : x
  2. Step 2: Convert to fraction form
    485,889.60/729,036 = 219,466.56/x
  3. Step 3: Cross multiply
    485,889.60x = 729,036 × 219,466.56
  4. Step 4: Simplify right side
    485,889.60x = 159,999,023,036.16
  5. Step 5: Solve for x
    x = 159,999,023,036.16/485,889.60
  6. Step 6: Final answer
    x = 329,290.90

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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.