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Finding the Fourth Proportional to 643.48, 886.62 and 608.92

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Solution

The fourth proportional to 643.48, 886.62 and 608.92 is: 839.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.48 : 886.62 = 608.92 : x
  2. Step 2: Convert to fraction form
    643.48/886.62 = 608.92/x
  3. Step 3: Cross multiply
    643.48x = 886.62 × 608.92
  4. Step 4: Simplify right side
    643.48x = 539,880.65
  5. Step 5: Solve for x
    x = 539,880.65/643.48
  6. Step 6: Final answer
    x = 839.00

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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.