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Finding the Fourth Proportional to 282,379.63, 389,686.62 and 155,057.95

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Solution

The fourth proportional to 282,379.63, 389,686.62 and 155,057.95 is: 213,981.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,379.63 : 389,686.62 = 155,057.95 : x
  2. Step 2: Convert to fraction form
    282,379.63/389,686.62 = 155,057.95/x
  3. Step 3: Cross multiply
    282,379.63x = 389,686.62 × 155,057.95
  4. Step 4: Simplify right side
    282,379.63x = 60,424,008,439.63
  5. Step 5: Solve for x
    x = 60,424,008,439.63/282,379.63
  6. Step 6: Final answer
    x = 213,981.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.