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Finding the Fourth Proportional to 282,993.80, 390,529.26 and 155,666.60

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Solution

The fourth proportional to 282,993.80, 390,529.26 and 155,666.60 is: 214,818.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,993.80 : 390,529.26 = 155,666.60 : x
  2. Step 2: Convert to fraction form
    282,993.80/390,529.26 = 155,666.60/x
  3. Step 3: Cross multiply
    282,993.80x = 390,529.26 × 155,666.60
  4. Step 4: Simplify right side
    282,993.80x = 60,792,362,104.72
  5. Step 5: Solve for x
    x = 60,792,362,104.72/282,993.80
  6. Step 6: Final answer
    x = 214,818.71

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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.