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Finding the Fourth Proportional to 643.01, 887.36 and 348.28

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Solution

The fourth proportional to 643.01, 887.36 and 348.28 is: 480.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.01 : 887.36 = 348.28 : x
  2. Step 2: Convert to fraction form
    643.01/887.36 = 348.28/x
  3. Step 3: Cross multiply
    643.01x = 887.36 × 348.28
  4. Step 4: Simplify right side
    643.01x = 309,047.76
  5. Step 5: Solve for x
    x = 309,047.76/643.01
  6. Step 6: Final answer
    x = 480.62

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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.