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Finding the Fourth Proportional to 328,686.78, 493,030.56 and 79,368.78

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Solution

The fourth proportional to 328,686.78, 493,030.56 and 79,368.78 is: 119,053.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,686.78 : 493,030.56 = 79,368.78 : x
  2. Step 2: Convert to fraction form
    328,686.78/493,030.56 = 79,368.78/x
  3. Step 3: Cross multiply
    328,686.78x = 493,030.56 × 79,368.78
  4. Step 4: Simplify right side
    328,686.78x = 39,131,234,049.92
  5. Step 5: Solve for x
    x = 39,131,234,049.92/328,686.78
  6. Step 6: Final answer
    x = 119,053.26

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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.