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Finding the Fourth Proportional to 639.14, 881.75 and 403.00

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Solution

The fourth proportional to 639.14, 881.75 and 403.00 is: 555.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.14 : 881.75 = 403.00 : x
  2. Step 2: Convert to fraction form
    639.14/881.75 = 403.00/x
  3. Step 3: Cross multiply
    639.14x = 881.75 × 403.00
  4. Step 4: Simplify right side
    639.14x = 355,344.34
  5. Step 5: Solve for x
    x = 355,344.34/639.14
  6. Step 6: Final answer
    x = 555.98

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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.