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Finding the Fourth Proportional to 643.01, 886.82 and 446.51

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Solution

The fourth proportional to 643.01, 886.82 and 446.51 is: 615.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.01 : 886.82 = 446.51 : x
  2. Step 2: Convert to fraction form
    643.01/886.82 = 446.51/x
  3. Step 3: Cross multiply
    643.01x = 886.82 × 446.51
  4. Step 4: Simplify right side
    643.01x = 395,973.98
  5. Step 5: Solve for x
    x = 395,973.98/643.01
  6. Step 6: Final answer
    x = 615.82

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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.