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Finding the Fourth Proportional to 643.50, 888.09 and 367.50

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Solution

The fourth proportional to 643.50, 888.09 and 367.50 is: 507.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.50 : 888.09 = 367.50 : x
  2. Step 2: Convert to fraction form
    643.50/888.09 = 367.50/x
  3. Step 3: Cross multiply
    643.50x = 888.09 × 367.50
  4. Step 4: Simplify right side
    643.50x = 326,373.08
  5. Step 5: Solve for x
    x = 326,373.08/643.50
  6. Step 6: Final answer
    x = 507.18

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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.