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Finding the Fourth Proportional to 330,710.97, 456,606.53 and 221,978.39

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Solution

The fourth proportional to 330,710.97, 456,606.53 and 221,978.39 is: 306,481.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,710.97 : 456,606.53 = 221,978.39 : x
  2. Step 2: Convert to fraction form
    330,710.97/456,606.53 = 221,978.39/x
  3. Step 3: Cross multiply
    330,710.97x = 456,606.53 × 221,978.39
  4. Step 4: Simplify right side
    330,710.97x = 101,356,782,392.89
  5. Step 5: Solve for x
    x = 101,356,782,392.89/330,710.97
  6. Step 6: Final answer
    x = 306,481.46

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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.