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Finding the Fourth Proportional to 328,689.08, 493,219.51 and 178,939.72

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Solution

The fourth proportional to 328,689.08, 493,219.51 and 178,939.72 is: 268,510.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,689.08 : 493,219.51 = 178,939.72 : x
  2. Step 2: Convert to fraction form
    328,689.08/493,219.51 = 178,939.72/x
  3. Step 3: Cross multiply
    328,689.08x = 493,219.51 × 178,939.72
  4. Step 4: Simplify right side
    328,689.08x = 88,256,561,017.94
  5. Step 5: Solve for x
    x = 88,256,561,017.94/328,689.08
  6. Step 6: Final answer
    x = 268,510.78

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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.