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Finding the Fourth Proportional to 282,696.94, 390,105.30 and 155,372.64

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Solution

The fourth proportional to 282,696.94, 390,105.30 and 155,372.64 is: 214,405.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,696.94 : 390,105.30 = 155,372.64 : x
  2. Step 2: Convert to fraction form
    282,696.94/390,105.30 = 155,372.64/x
  3. Step 3: Cross multiply
    282,696.94x = 390,105.30 × 155,372.64
  4. Step 4: Simplify right side
    282,696.94x = 60,611,690,338.99
  5. Step 5: Solve for x
    x = 60,611,690,338.99/282,696.94
  6. Step 6: Final answer
    x = 214,405.19

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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.