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Finding the Fourth Proportional to 328,555.68, 492,894.35 and 103,972.65

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Solution

The fourth proportional to 328,555.68, 492,894.35 and 103,972.65 is: 155,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,555.68 : 492,894.35 = 103,972.65 : x
  2. Step 2: Convert to fraction form
    328,555.68/492,894.35 = 103,972.65/x
  3. Step 3: Cross multiply
    328,555.68x = 492,894.35 × 103,972.65
  4. Step 4: Simplify right side
    328,555.68x = 51,247,531,739.53
  5. Step 5: Solve for x
    x = 51,247,531,739.53/328,555.68
  6. Step 6: Final answer
    x = 155,978.22

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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.