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Finding the Fourth Proportional to 328,493.88, 492,767.70 and 103,869.72

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Solution

The fourth proportional to 328,493.88, 492,767.70 and 103,869.72 is: 155,813.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,493.88 : 492,767.70 = 103,869.72 : x
  2. Step 2: Convert to fraction form
    328,493.88/492,767.70 = 103,869.72/x
  3. Step 3: Cross multiply
    328,493.88x = 492,767.70 × 103,869.72
  4. Step 4: Simplify right side
    328,493.88x = 51,183,643,024.04
  5. Step 5: Solve for x
    x = 51,183,643,024.04/328,493.88
  6. Step 6: Final answer
    x = 155,813.08

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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.