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Finding the Fourth Proportional to 328,965.76, 493,449.92 and 79,647.36

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Solution

The fourth proportional to 328,965.76, 493,449.92 and 79,647.36 is: 119,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,965.76 : 493,449.92 = 79,647.36 : x
  2. Step 2: Convert to fraction form
    328,965.76/493,449.92 = 79,647.36/x
  3. Step 3: Cross multiply
    328,965.76x = 493,449.92 × 79,647.36
  4. Step 4: Simplify right side
    328,965.76x = 39,301,983,420.21
  5. Step 5: Solve for x
    x = 39,301,983,420.21/328,965.76
  6. Step 6: Final answer
    x = 119,471.35

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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.