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Finding the Fourth Proportional to 321,103.08, 442,605.80 and 217,703.77

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Solution

The fourth proportional to 321,103.08, 442,605.80 and 217,703.77 is: 300,081.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,103.08 : 442,605.80 = 217,703.77 : x
  2. Step 2: Convert to fraction form
    321,103.08/442,605.80 = 217,703.77/x
  3. Step 3: Cross multiply
    321,103.08x = 442,605.80 × 217,703.77
  4. Step 4: Simplify right side
    321,103.08x = 96,356,951,283.87
  5. Step 5: Solve for x
    x = 96,356,951,283.87/321,103.08
  6. Step 6: Final answer
    x = 300,081.06

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1.5x scale

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.