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Finding the Fourth Proportional to 422,678.30, 634,580.40 and 245,312.60

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Solution

The fourth proportional to 422,678.30, 634,580.40 and 245,312.60 is: 368,295.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,678.30 : 634,580.40 = 245,312.60 : x
  2. Step 2: Convert to fraction form
    422,678.30/634,580.40 = 245,312.60/x
  3. Step 3: Cross multiply
    422,678.30x = 634,580.40 × 245,312.60
  4. Step 4: Simplify right side
    422,678.30x = 155,670,567,833.04
  5. Step 5: Solve for x
    x = 155,670,567,833.04/422,678.30
  6. Step 6: Final answer
    x = 368,295.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.