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Finding the Fourth Proportional to 642.97, 885.94 and 435.61

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Solution

The fourth proportional to 642.97, 885.94 and 435.61 is: 600.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.97 : 885.94 = 435.61 : x
  2. Step 2: Convert to fraction form
    642.97/885.94 = 435.61/x
  3. Step 3: Cross multiply
    642.97x = 885.94 × 435.61
  4. Step 4: Simplify right side
    642.97x = 385,924.32
  5. Step 5: Solve for x
    x = 385,924.32/642.97
  6. Step 6: Final answer
    x = 600.22

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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.