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Finding the Fourth Proportional to 330,710.58, 456,605.91 and 221,977.80

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Solution

The fourth proportional to 330,710.58, 456,605.91 and 221,977.80 is: 306,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,710.58 : 456,605.91 = 221,977.80 : x
  2. Step 2: Convert to fraction form
    330,710.58/456,605.91 = 221,977.80/x
  3. Step 3: Cross multiply
    330,710.58x = 456,605.91 × 221,977.80
  4. Step 4: Simplify right side
    330,710.58x = 101,356,375,368.80
  5. Step 5: Solve for x
    x = 101,356,375,368.80/330,710.58
  6. Step 6: Final answer
    x = 306,480.60

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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.