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Finding the Fourth Proportional to 643.66, 887.08 and 614.50

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Solution

The fourth proportional to 643.66, 887.08 and 614.50 is: 846.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.66 : 887.08 = 614.50 : x
  2. Step 2: Convert to fraction form
    643.66/887.08 = 614.50/x
  3. Step 3: Cross multiply
    643.66x = 887.08 × 614.50
  4. Step 4: Simplify right side
    643.66x = 545,110.66
  5. Step 5: Solve for x
    x = 545,110.66/643.66
  6. Step 6: Final answer
    x = 846.89

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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.