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Finding the Fourth Proportional to 282,732.68, 390,171.39 and 155,405.54

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Solution

The fourth proportional to 282,732.68, 390,171.39 and 155,405.54 is: 214,459.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,732.68 : 390,171.39 = 155,405.54 : x
  2. Step 2: Convert to fraction form
    282,732.68/390,171.39 = 155,405.54/x
  3. Step 3: Cross multiply
    282,732.68x = 390,171.39 × 155,405.54
  4. Step 4: Simplify right side
    282,732.68x = 60,634,795,555.50
  5. Step 5: Solve for x
    x = 60,634,795,555.50/282,732.68
  6. Step 6: Final answer
    x = 214,459.81

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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.