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Finding the Fourth Proportional to 503,485.12, 755,338.65 and 219,221.29

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Solution

The fourth proportional to 503,485.12, 755,338.65 and 219,221.29 is: 328,880.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,485.12 : 755,338.65 = 219,221.29 : x
  2. Step 2: Convert to fraction form
    503,485.12/755,338.65 = 219,221.29/x
  3. Step 3: Cross multiply
    503,485.12x = 755,338.65 × 219,221.29
  4. Step 4: Simplify right side
    503,485.12x = 165,586,313,239.86
  5. Step 5: Solve for x
    x = 165,586,313,239.86/503,485.12
  6. Step 6: Final answer
    x = 328,880.25

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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.