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Finding the Fourth Proportional to 328,429.80, 492,641.76 and 103,790.28

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Solution

The fourth proportional to 328,429.80, 492,641.76 and 103,790.28 is: 155,684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,429.80 : 492,641.76 = 103,790.28 : x
  2. Step 2: Convert to fraction form
    328,429.80/492,641.76 = 103,790.28/x
  3. Step 3: Cross multiply
    328,429.80x = 492,641.76 × 103,790.28
  4. Step 4: Simplify right side
    328,429.80x = 51,131,426,210.09
  5. Step 5: Solve for x
    x = 51,131,426,210.09/328,429.80
  6. Step 6: Final answer
    x = 155,684.49

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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.