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Finding the Fourth Proportional to 213,635.30, 320,428.65 and 55,879.70

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Solution

The fourth proportional to 213,635.30, 320,428.65 and 55,879.70 is: 83,813.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,635.30 : 320,428.65 = 55,879.70 : x
  2. Step 2: Convert to fraction form
    213,635.30/320,428.65 = 55,879.70/x
  3. Step 3: Cross multiply
    213,635.30x = 320,428.65 × 55,879.70
  4. Step 4: Simplify right side
    213,635.30x = 17,905,456,833.41
  5. Step 5: Solve for x
    x = 17,905,456,833.41/213,635.30
  6. Step 6: Final answer
    x = 83,813.19

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1.5x scale

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.