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Finding the Fourth Proportional to 670,662.89, 1,005,780.95 and 221,300.00

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Solution

The fourth proportional to 670,662.89, 1,005,780.95 and 221,300.00 is: 331,879.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,662.89 : 1,005,780.95 = 221,300.00 : x
  2. Step 2: Convert to fraction form
    670,662.89/1,005,780.95 = 221,300.00/x
  3. Step 3: Cross multiply
    670,662.89x = 1,005,780.95 × 221,300.00
  4. Step 4: Simplify right side
    670,662.89x = 222,579,322,701.15
  5. Step 5: Solve for x
    x = 222,579,322,701.15/670,662.89
  6. Step 6: Final answer
    x = 331,879.59

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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.