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Finding the Fourth Proportional to 282,355.56, 389,651.10 and 155,039.28

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Solution

The fourth proportional to 282,355.56, 389,651.10 and 155,039.28 is: 213,954.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,355.56 : 389,651.10 = 155,039.28 : x
  2. Step 2: Convert to fraction form
    282,355.56/389,651.10 = 155,039.28/x
  3. Step 3: Cross multiply
    282,355.56x = 389,651.10 × 155,039.28
  4. Step 4: Simplify right side
    282,355.56x = 60,411,225,995.21
  5. Step 5: Solve for x
    x = 60,411,225,995.21/282,355.56
  6. Step 6: Final answer
    x = 213,954.44

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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.