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Finding the Fourth Proportional to 328,695.55, 493,107.26 and 126,276.91

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Solution

The fourth proportional to 328,695.55, 493,107.26 and 126,276.91 is: 189,439.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,695.55 : 493,107.26 = 126,276.91 : x
  2. Step 2: Convert to fraction form
    328,695.55/493,107.26 = 126,276.91/x
  3. Step 3: Cross multiply
    328,695.55x = 493,107.26 × 126,276.91
  4. Step 4: Simplify right side
    328,695.55x = 62,268,060,459.98
  5. Step 5: Solve for x
    x = 62,268,060,459.98/328,695.55
  6. Step 6: Final answer
    x = 189,439.93

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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.