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Finding the Fourth Proportional to 455,955.30, 628,891.98 and 320,019.58

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Solution

The fourth proportional to 455,955.30, 628,891.98 and 320,019.58 is: 441,397.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,955.30 : 628,891.98 = 320,019.58 : x
  2. Step 2: Convert to fraction form
    455,955.30/628,891.98 = 320,019.58/x
  3. Step 3: Cross multiply
    455,955.30x = 628,891.98 × 320,019.58
  4. Step 4: Simplify right side
    455,955.30x = 201,257,744,160.51
  5. Step 5: Solve for x
    x = 201,257,744,160.51/455,955.30
  6. Step 6: Final answer
    x = 441,397.98

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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.