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Finding the Fourth Proportional to 328,139.85, 491,444.97 and 316,774.97

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Solution

The fourth proportional to 328,139.85, 491,444.97 and 316,774.97 is: 474,424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,139.85 : 491,444.97 = 316,774.97 : x
  2. Step 2: Convert to fraction form
    328,139.85/491,444.97 = 316,774.97/x
  3. Step 3: Cross multiply
    328,139.85x = 491,444.97 × 316,774.97
  4. Step 4: Simplify right side
    328,139.85x = 155,677,463,171.18
  5. Step 5: Solve for x
    x = 155,677,463,171.18/328,139.85
  6. Step 6: Final answer
    x = 474,424.13

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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.