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Finding the Fourth Proportional to 328,606.08, 492,908.80 and 79,288

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Solution

The fourth proportional to 328,606.08, 492,908.80 and 79,288 is: 118,931.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,606.08 : 492,908.80 = 79,288 : x
  2. Step 2: Convert to fraction form
    328,606.08/492,908.80 = 79,288/x
  3. Step 3: Cross multiply
    328,606.08x = 492,908.80 × 79,288
  4. Step 4: Simplify right side
    328,606.08x = 39,081,752,934.40
  5. Step 5: Solve for x
    x = 39,081,752,934.40/328,606.08
  6. Step 6: Final answer
    x = 118,931.92

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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.